It’s not just you, but it doesn’t seem to have anything to do with the number of devices, either. People have been reporting new problems of this type for the last few days with both the iOS app and the android app.
BTW, you can always check the first bug reports page in the community – created wiki to see if others are reporting similar problems: 
http://thingsthataresmart.wiki/index.php?title=Bug:_First_Reports