Edit 2/14/22: Oh no!! It just STARTED happening with the internet version also. I bet they're doing this on purpose so you pay. The stinkers I had to uninstall app bc in the last 6 or so mos once I either read & deleted or just plain deleted message then exited app it STILL stayed as UNREAD. Only way to remove unread was to go back to EMAIL & exit back out. Then it'd show 0 unread. I just got so frustrated I uninstalled app & just use the internet version. Otherwise everything else was fine.