fix: due date events in activity logging

Signed-off-by: Luka Trovic <luka@nextcloud.com>

Author: luka-nextcloud

lib/Activity/ActivityManager.php

@@ -269,6 +269,9 @@ public function triggerUpdateEvents($objectType, ChangeSet $changeSet, $subject)
 					'after' => $entity->$getter()
 				];
 				if ($changes['before'] !== $changes['after']) {
+					if ($field === 'duedate' && $changes['before']->format('c') === $changes['after']->format('c')) {
+						continue;
+					}
 					try {
 						$event = $this->createEvent($objectType, $entity, $subjectComplete, $changes, $this->userId);
 						if ($event !== null) {