diff --git a/build/php b/build/php
index f292501a7..cf79c0172 160000
--- a/build/php
+++ b/build/php
@@ -1 +1 @@
-Subproject commit f292501a703352ab793b07b7861f3e1b3860ed86
+Subproject commit cf79c0172283a0a26f2c3695af260d100e0fdabd
diff --git a/changelogs/4.7.md b/changelogs/4.7.md
index 950158cd3..bdbdf5249 100644
--- a/changelogs/4.7.md
+++ b/changelogs/4.7.md
@@ -29,3 +29,18 @@ Released 16th August 2022.
 - Fixed crash when processing player skins with invalid geometry data.
 - Fixed spectator players being able to pick blocks using mousewheel click.
 - Improved supporting requirements for sugarcane.
+
+# 4.7.3
+Released 22nd August 2022.
+
+## General
+- Added complete translations for Spanish and Vietnamese.
+- All continuous integration (static analysis, unit tests, integration tests) are now performed on PHP 8.1 as well as 8.0.
+- InventoryTransaction now verifies that stack sizes of items after the transaction don't exceed the maximum stack size of the item type or the containing inventory.
+
+## Fixes
+- Fixed Normal generator crash on PHP 8.1.
+- Fixed a race condition during async worker shutdown that could lead to tasks executing in the wrong order. This (very rarely) led to a crash in `PopulationTask` due to its preceding `GeneratorRegisterTask` not being executed.
+- Fixed `/give` accepting negative amounts or amounts larger than 32767 (vanilla max).
+- Fixed placement conditions for vines (no longer able to be placed on the side of cacti).
+- Fixed incorrect documentation of `SignText::__construct()`.
diff --git a/changelogs/4.8.md b/changelogs/4.8.md
new file mode 100644
index 000000000..4f1cde520
--- /dev/null
+++ b/changelogs/4.8.md
@@ -0,0 +1,14 @@
+**For Minecraft: Bedrock Edition 1.19.21**
+
+### Note about API versions
+Plugins which don't touch the protocol and compatible with any previous 4.x.y version will also run on these releases and do not need API bumps.
+Plugin developers should **only** update their required API to this version if you need the changes in this build.
+
+**WARNING: If your plugin uses the protocol, you're not shielded by API change constraints.** You should consider using the `mcpe-protocol` directive in `plugin.yml` as a constraint if you do.
+
+# 4.8.0
+Released 9th August 2022.
+
+## General
+- Added support for Minecraft: Bedrock Edition 1.19.21.
+- Removed support for older versions.
diff --git a/composer.json b/composer.json
index 5bd92f912..206fce6d5 100644
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,7 @@
       "pocketmine/bedrock-block-upgrade-schema": "dev-master@dev",
       "pocketmine/bedrock-data": "dev-modern-world-support@dev",
       "pocketmine/bedrock-item-upgrade-schema": "dev-master",
-      "pocketmine/bedrock-protocol": "~12.0.0+bedrock-1.19.20",
+      "pocketmine/bedrock-protocol": "~12.2.0+bedrock-1.19.20",
       "pocketmine/binaryutils": "^0.2.1",
       "pocketmine/callback-validator": "^1.0.2",
       "pocketmine/classloader": "^0.2.0",
diff --git a/composer.lock b/composer.lock
index fd93078e5..9bfb5608c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "2466f7f325b36cce50ce002854e85f89",
+    "content-hash": "5e91ab5b70093a7566adf2d1be7a7dbc",
     "packages": [
         {
             "name": "adhocore/json-comment",
@@ -325,16 +325,16 @@
         },
         {
             "name": "pocketmine/bedrock-protocol",
-            "version": "12.0.0+bedrock-1.19.20",
+            "version": "12.2.0+bedrock-1.19.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/pmmp/BedrockProtocol.git",
-                "reference": "c2778039544fa0c7c5bd3af7963149e7552f4215"
+                "reference": "d1b3e83f77e2c6628b64793485260cddc55d92e3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/pmmp/BedrockProtocol/zipball/c2778039544fa0c7c5bd3af7963149e7552f4215",
-                "reference": "c2778039544fa0c7c5bd3af7963149e7552f4215",
+                "url": "https://api.github.com/repos/pmmp/BedrockProtocol/zipball/d1b3e83f77e2c6628b64793485260cddc55d92e3",
+                "reference": "d1b3e83f77e2c6628b64793485260cddc55d92e3",
                 "shasum": ""
             },
             "require": {
@@ -366,9 +366,9 @@
             "description": "An implementation of the Minecraft: Bedrock Edition protocol in PHP",
             "support": {
                 "issues": "https://github.com/pmmp/BedrockProtocol/issues",
-                "source": "https://github.com/pmmp/BedrockProtocol/tree/bedrock-1.19.20"
+                "source": "https://github.com/pmmp/BedrockProtocol/tree/12.2.0+bedrock-1.19.21"
             },
-            "time": "2022-08-09T17:57:29+00:00"
+            "time": "2022-08-24T18:47:37+00:00"
         },
         {
             "name": "pocketmine/binaryutils",
diff --git a/src/block/Vine.php b/src/block/Vine.php
index 6fa3ee8f1..9edeca3c4 100644
--- a/src/block/Vine.php
+++ b/src/block/Vine.php
@@ -105,7 +105,7 @@ class Vine extends Flowable{
 	}
 
 	public function place(BlockTransaction $tx, Item $item, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector, ?Player $player = null) : bool{
-		if(!$blockClicked->isSolid() || Facing::axis($face) === Axis::Y){
+		if(!$blockClicked->isFullCube() || Facing::axis($face) === Axis::Y){
 			return false;
 		}
 
diff --git a/src/block/utils/SignText.php b/src/block/utils/SignText.php
index cdde8f5eb..27e8b5c5e 100644
--- a/src/block/utils/SignText.php
+++ b/src/block/utils/SignText.php
@@ -42,7 +42,7 @@ class SignText{
 	private bool $glowing;
 
 	/**
-	 * @param string[]|null $lines index-sensitive; omitting an index will leave it unchanged
+	 * @param string[]|null $lines index-sensitive; keys 0-3 will be used, regardless of array order
 	 *
 	 * @throws \InvalidArgumentException if the array size is greater than 4
 	 * @throws \InvalidArgumentException if invalid keys (out of bounds or string) are found in the array
diff --git a/src/command/defaults/GiveCommand.php b/src/command/defaults/GiveCommand.php
index 2d465c74c..ed3e5df42 100644
--- a/src/command/defaults/GiveCommand.php
+++ b/src/command/defaults/GiveCommand.php
@@ -71,7 +71,11 @@ class GiveCommand extends VanillaCommand{
 		if(!isset($args[2])){
 			$item->setCount($item->getMaxStackSize());
 		}else{
-			$item->setCount((int) $args[2]);
+			$count = $this->getBoundedInt($sender, $args[2], 1, 32767);
+			if($count === null){
+				return true;
+			}
+			$item->setCount($count);
 		}
 
 		if(isset($args[3])){
diff --git a/src/command/defaults/VersionCommand.php b/src/command/defaults/VersionCommand.php
index 6c579cdda..0200c4ff3 100644
--- a/src/command/defaults/VersionCommand.php
+++ b/src/command/defaults/VersionCommand.php
@@ -32,9 +32,7 @@ use pocketmine\utils\TextFormat;
 use pocketmine\utils\Utils;
 use pocketmine\VersionInfo;
 use function count;
-use function function_exists;
 use function implode;
-use function opcache_get_status;
 use function sprintf;
 use function stripos;
 use function strtolower;
@@ -67,16 +65,10 @@ class VersionCommand extends VanillaCommand{
 			));
 			$sender->sendMessage(KnownTranslationFactory::pocketmine_command_version_phpVersion(PHP_VERSION));
 
-			if(
-				function_exists('opcache_get_status') &&
-				($opcacheStatus = opcache_get_status(false)) !== false &&
-				isset($opcacheStatus["jit"]["on"])
-			){
-				$jit = $opcacheStatus["jit"];
-				if($jit["on"] === true){
-					$jitStatus = KnownTranslationFactory::pocketmine_command_version_phpJitEnabled(
-						sprintf("CRTO: %s%s%s%s", $jit["opt_flags"] >> 2, $jit["opt_flags"] & 0x03, $jit["kind"], $jit["opt_level"])
-					);
+			$jitMode = Utils::getOpcacheJitMode();
+			if($jitMode !== null){
+				if($jitMode !== 0){
+					$jitStatus = KnownTranslationFactory::pocketmine_command_version_phpJitEnabled(sprintf("CRTO: %d", $jitMode));
 				}else{
 					$jitStatus = KnownTranslationFactory::pocketmine_command_version_phpJitDisabled();
 				}
diff --git a/src/crash/CrashDump.php b/src/crash/CrashDump.php
index 101e35201..e724ea217 100644
--- a/src/crash/CrashDump.php
+++ b/src/crash/CrashDump.php
@@ -164,6 +164,8 @@ class CrashDump{
 		}
 		$this->data->extensions = $extensions;
 
+		$this->data->jit_mode = Utils::getOpcacheJitMode();
+
 		if($this->server->getConfigGroup()->getPropertyBool("auto-report.send-phpinfo", true)){
 			ob_start();
 			phpinfo();
diff --git a/src/crash/CrashDumpData.php b/src/crash/CrashDumpData.php
index 264f67d67..0f5358be5 100644
--- a/src/crash/CrashDumpData.php
+++ b/src/crash/CrashDumpData.php
@@ -66,6 +66,8 @@ final class CrashDumpData implements \JsonSerializable{
 	 */
 	public array $extensions = [];
 
+	public ?int $jit_mode = null;
+
 	public string $phpinfo = "";
 
 	public CrashDumpDataGeneral $general;
diff --git a/src/inventory/transaction/action/DropItemAction.php b/src/inventory/transaction/action/DropItemAction.php
index 896d8fbe9..636317fcf 100644
--- a/src/inventory/transaction/action/DropItemAction.php
+++ b/src/inventory/transaction/action/DropItemAction.php
@@ -42,6 +42,9 @@ class DropItemAction extends InventoryAction{
 		if($this->targetItem->isNull()){
 			throw new TransactionValidationException("Cannot drop an empty itemstack");
 		}
+		if($this->targetItem->getCount() > $this->targetItem->getMaxStackSize()){
+			throw new TransactionValidationException("Target item exceeds item type max stack size");
+		}
 	}
 
 	public function onPreExecute(Player $source) : bool{
diff --git a/src/inventory/transaction/action/SlotChangeAction.php b/src/inventory/transaction/action/SlotChangeAction.php
index cee364ed0..453f0c4d2 100644
--- a/src/inventory/transaction/action/SlotChangeAction.php
+++ b/src/inventory/transaction/action/SlotChangeAction.php
@@ -68,6 +68,12 @@ class SlotChangeAction extends InventoryAction{
 		if(!$this->inventory->getItem($this->inventorySlot)->equalsExact($this->sourceItem)){
 			throw new TransactionValidationException("Slot does not contain expected original item");
 		}
+		if($this->targetItem->getCount() > $this->targetItem->getMaxStackSize()){
+			throw new TransactionValidationException("Target item exceeds item type max stack size");
+		}
+		if($this->targetItem->getCount() > $this->inventory->getMaxStackSize()){
+			throw new TransactionValidationException("Target item exceeds inventory max stack size");
+		}
 	}
 
 	/**
diff --git a/src/thread/Worker.php b/src/thread/Worker.php
index 1315202b1..572da3c67 100644
--- a/src/thread/Worker.php
+++ b/src/thread/Worker.php
@@ -56,7 +56,9 @@ abstract class Worker extends \Worker{
 		$this->isKilled = true;
 
 		if(!$this->isShutdown()){
-			while($this->unstack() !== null);
+			$this->synchronized(function() : void{
+				while($this->unstack() !== null);
+			});
 			$this->notify();
 			$this->shutdown();
 		}
diff --git a/src/utils/Utils.php b/src/utils/Utils.php
index 03377b6c4..8d27c9861 100644
--- a/src/utils/Utils.php
+++ b/src/utils/Utils.php
@@ -69,6 +69,7 @@ use function mb_check_encoding;
 use function ob_end_clean;
 use function ob_get_contents;
 use function ob_start;
+use function opcache_get_status;
 use function ord;
 use function php_uname;
 use function phpversion;
@@ -486,8 +487,8 @@ final class Utils{
 	 */
 	public static function currentTrace(int $skipFrames = 0) : array{
 		++$skipFrames; //omit this frame from trace, in addition to other skipped frames
-		if(function_exists("xdebug_get_function_stack")){
-			$trace = array_reverse(xdebug_get_function_stack());
+		if(function_exists("xdebug_get_function_stack") && count($trace = @xdebug_get_function_stack()) !== 0){
+			$trace = array_reverse($trace);
 		}else{
 			$e = new \Exception();
 			$trace = $e->getTrace();
@@ -634,4 +635,30 @@ final class Utils{
 	public static function checkLocationNotInfOrNaN(Location $location) : void{
 		self::checkVector3NotInfOrNaN($location);
 	}
+
+	/**
+	 * Returns an integer describing the current OPcache JIT setting.
+	 * @see https://www.php.net/manual/en/opcache.configuration.php#ini.opcache.jit
+	 */
+	public static function getOpcacheJitMode() : ?int{
+		if(
+			function_exists('opcache_get_status') &&
+			($opcacheStatus = opcache_get_status(false)) !== false &&
+			isset($opcacheStatus["jit"]["on"])
+		){
+			$jit = $opcacheStatus["jit"];
+			if($jit["on"] === true){
+				return (($jit["opt_flags"] >> 2) * 1000) +
+					(($jit["opt_flags"] & 0x03) * 100) +
+					($jit["kind"] * 10) +
+					$jit["opt_level"];
+			}
+
+			//jit available, but disabled
+			return 0;
+		}
+
+		//jit not available
+		return null;
+	}
 }
diff --git a/tests/phpstan/configs/phpstan-bugs.neon b/tests/phpstan/configs/phpstan-bugs.neon
index bfb3b1734..dcfda66bc 100644
--- a/tests/phpstan/configs/phpstan-bugs.neon
+++ b/tests/phpstan/configs/phpstan-bugs.neon
@@ -35,11 +35,6 @@ parameters:
 			count: 1
 			path: ../../../src/network/mcpe/handler/InGamePacketHandler.php
 
-		-
-			message: "#^Negated boolean expression is always true\\.$#"
-			count: 1
-			path: ../../../src/network/mcpe/handler/InGamePacketHandler.php
-
 		-
 			message: "#^Property pocketmine\\\\network\\\\mcpe\\\\raklib\\\\PthreadsChannelWriter\\:\\:\\$buffer is never read, only written\\.$#"
 			count: 1