diff --git a/boot.php b/boot.php
index 6674c6fc7c..504f997d9f 100644
--- a/boot.php
+++ b/boot.php
@@ -201,6 +201,7 @@ define('PRIORITY_HIGH',       20);
 define('PRIORITY_MEDIUM',     30);
 define('PRIORITY_LOW',        40);
 define('PRIORITY_NEGLIGIBLE', 50);
+define('PRIORITIES', [PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE]);
 /* @}*/
 
 /**
diff --git a/src/Core/Worker.php b/src/Core/Worker.php
index 4f45527764..4fcca35f12 100644
--- a/src/Core/Worker.php
+++ b/src/Core/Worker.php
@@ -421,6 +421,11 @@ class Worker
 		// For this reason the variables have to be initialized.
 		DI::profiler()->reset();
 
+		if (!in_array($queue['priority'], PRIORITIES)) {
+			Logger::warning('Invalid period', ['queue' => $queue, 'callstack' => System::callstack(20)]);
+			$queue['priority'] = PRIORITY_MEDIUM;
+		}
+
 		$a->queue = $queue;
 
 		$up_duration = microtime(true) - self::$up_start;
@@ -1264,6 +1269,11 @@ class Worker
 		$found = DBA::exists('workerqueue', ['command' => $command, 'parameter' => $parameters, 'done' => false]);
 		$added = false;
 
+		if (!in_array($priority, PRIORITIES)) {
+			Logger::warning('Invalid period', ['priority' => $priority, 'command' => $command, 'callstack' => System::callstack(20)]);
+			$priority = PRIORITY_MEDIUM;
+		}
+
 		// Quit if there was a database error - a precaution for the update process to 3.5.3
 		if (DBA::errorNo() != 0) {
 			return false;
diff --git a/src/Model/Item.php b/src/Model/Item.php
index d41e84c5b9..15ea69eeb9 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -1568,7 +1568,7 @@ class Item
 			$item['network'] = Protocol::DFRN;
 			$item['protocol'] = Conversation::PARCEL_DIRECT;
 
-			if (is_int($notify)) {
+			if (in_array($notify, PRIORITIES)) {
 				$priority = $notify;
 			}
 		} else {
@@ -2912,7 +2912,7 @@ class Item
 		$_SESSION["authenticated"] = true;
 		$_SESSION["uid"] = $contact['uid'];
 
-		return $result;
+		return (bool)$result;
 	}
 
 	/**
diff --git a/src/Protocol/Feed.php b/src/Protocol/Feed.php
index fa568b4c3c..a2e9daaa03 100644
--- a/src/Protocol/Feed.php
+++ b/src/Protocol/Feed.php
@@ -623,7 +623,7 @@ class Feed
 						'taglist' => $taglist, 'attachments' => $attachments];
 				}
 			} else {
-				Logger::info('Post already crated or exists in the delayed posts queue', ['uid' => $item['uid'], 'uri' => $item["uri"]]);
+				Logger::info('Post already created or exists in the delayed posts queue', ['uid' => $item['uid'], 'uri' => $item["uri"]]);
 			}
 		}
 
diff --git a/src/Worker/DelayedPublish.php b/src/Worker/DelayedPublish.php
index beffb22e30..db37ba3067 100644
--- a/src/Worker/DelayedPublish.php
+++ b/src/Worker/DelayedPublish.php
@@ -22,9 +22,7 @@
 namespace Friendica\Worker;
 
 use Friendica\Core\Logger;
-use Friendica\Model\Item;
 use Friendica\Model\Post;
-use Friendica\Model\Tag;
 
 class DelayedPublish
 {
@@ -40,6 +38,6 @@ class DelayedPublish
 	public static function execute(array $item, int $notify = 0, array $taglist = [], array $attachments = [])
 	{
 		$id = Post\Delayed::publish($item, $notify, $taglist, $attachments);
-		Logger::notice('Post published', ['id' => $id, 'uid' => $item['uid'], 'cid' => $item['contact-id']]);
+		Logger::notice('Post published', ['id' => $id, 'uid' => $item['uid'], 'cid' => $item['contact-id'], 'notify' => $notify]);
 	}
 }