I have deleted all auto-snooze settings except one, put it in it's own list all by itself, filtered that list alone to use auto-snooze, removed all other auto-snooze settings from other reminders and did a hard reset of the phone. Still no luck in getting it to work.
At this point I think that I need to just start from scratch instead of trying different settings. If all of my reminders return OK, then I will try one auto-snooze and see if it will work. If so, then I will add them back one at a time. With this approach in mind, I have a couple of questions:
Is there some setting in the app to reset the settings back to their original states? I could try that.
Otherwise, I think I will delete the app and reinstall a new copy. If I do this I know that I will lose things like smart lists and auto-snooze settings and maybe other things. But if I just get back all of my reminders, that will be OK. Quite a few have custom monthly repeats such as 2nd Tuesday, Last Workday, Last Wednesday, etc. Would be good if those come back as well.
Concerning auto-snooze, it would be nice to be able to look at the list of reminders and see the little auto-snooze alert icon to distinguish those from regular alerts.