I am experiencing this in Stable as well, minus the visual notification bit. Steps the same as for in Testing:
1. Set a timer for at least 25 minutes. 2. Let it countdown till the end. 3. The chime will ring multiple times instead of once. Timers set after the initial one ring multiple times as well. For example, if you set a 5 second timer after the first 25 minute one, the 5 second timer will chime multiple times instead of once.
