Using the mobile app on my android phone, I get multiple notification for some events in Moodle's global calendar (but not all of the calendars). Sometimes, up to 24 notifications are displayed at once (as seen in attached screenshots).

The calendar used to be present multiple times in Moodle, but that was fixed. I have then removed/re-added the site (Moodle HQ's site), uninstalled/reinstalled the app, the issue still occurs.