Hey Ron! I actually spotted this issue the other day in a test account I maintain for version testing and was able to get the issue escalated to development for review. This issue appears to relate to deleting the last message in a folder; does that line up with your results? I did receive word that we've identified a potential fix so this shouldn't be a problem too much longer. If you'd like I can get a ticket started for us so we can let you know when this fix is ready for testing!

Kyle. Sounds about right. I trust yall get to the bottom of it.

This is still an issue and yes it always seem to occur when deleting all from folder.