If you bring the app into focus (open it), then click the bell icon at the top left, does it show you the alarms/clear it then? Ongoing alarm conditions and events that are due on the calendar will remain displayed until the alarm condition clears or the calendar event has been completed. I'm guessing by the screenshot file name suffix 'One UI' that it's a Samsung phone running Android so the UI is Samsung's proprietary skinned version which may behave differently from phones running stock Android. Can always clear the app storage/cache and sign back into Apex Fusion to see if that helps.