The new event notification seems to be persistently saving a variable it shouldnt.
If you open an event notification and the event plays, and then you hit back (goes to events tab in app) and select any other event, the first (notified about) event plays again. Backing out the second time you get only that one event on the events list.
Dragging down to refresh the events page before tapping fixes it. (I assume this clears it)
Am on android.
Edit:
@WyzeAndy
This bug persists on 2.16.14 though it seems there is no forum post about that version. Log file 72960 though Im not sure that will show anything based on what the issue is.