This has happened to me twice now. When Aruru reset it was fixed, but now it has reverted.
What happens is the galaxy view (when fully zoomed out to the first layer you see when starting the game) occassionally the squares you are meant to see downright disappear entirely.
You can't select any tiles, although a blank one has an outline, and touching it does nothing.
This issue is solved by manually ressetting the app, otherwise it stays even after you have left the app or logged off and on your account.
Has anyone else seen this issue?