This seems to be an ongoing issue. I stopped playing historic a bit ago because of this, played standard a while with no issues, went back to historic today and its still a problem. After locking in sideboard swaps after game 1 and 2 and tapping done, the screen goes back to showing no sideboard at all and displays the deck with the desired changes, in this case boarding in Brotherhoods End, still has a done button but nothing works, and timer just runs down til next game starts. Except, no sideboarding actually happens, the BEs were still in my board, not deck, boarding after game 2. Tried again, same **** with the unresponsive screen and no sideboard displayed after tapping done again. Pretty game breaking not being able to actually sideboard in a b03 match. Nice losing ranked games to bugs. On android.