Playing on android mobile client.
I temporarily switched networks due to a wifi outage while connecting to a match in Ranked Explorer Bo3.
I was able to play the first game without any obvious issue, but could not move cards from sideboard to main deck after Game 1.
I even attempted to move main deck cards to sideboard, which the client allowed, but could not move them back to the main board.
Played Game 2 without changes to main deck, no other obvious issues.
The same bug occurred between Games 2 and 3, with the added bug of being unable to switch between deck view and battlefield view.
Could not save log. Could not find workaround.