After update, I was one of many with the spinning circle. Following directions here, I uninstalled and reinstalled.
after playing this morning and finishing a game, I was taken back to the home screen and met with the spinning circle. Closing and reopening app doesn’t fix it.
@Brigby tell your people I am not going to constantly uninstall and reinstall their app just because they punted and released a defective product. Whatever they are doing, they need to halt everything and sort this out IMMEDIATELY!
On Android (possibly iOS too) you can go into settings->apps->MTGPQ (or long press on the Magic: PQ bar after hitting square) and clear the data. You’ll have to log in again through Facebook, but it takes less time and annoyance than reinstalling the game. This cleared up the spinning circle for me.