I've noticed a few actions or the confirmation of actions taking very long time or not showing completed.
First example is the lock request, spins for an unusually long time, the green check doesn't appear.
Second example, I was trying to delete a [Departure Time] event from the task list, after clicking the delete button, the process did not complete and went back to displaying the event, I tried force/stop and cache clear, restart app, task still listed. The only way I could delete it was to try switching it off/on, then later the delete would work.