Best of 3 sideboarding glitch

In my last game, my sideboarding screen went to the following (see screenshot attached). This was in best of 3 ranked. Never seen this before.

Able to move cards around but timer was frozen at 50seconds and I couldn't submit changes. Had to close game and restart but then just entered game 2 with none of the changes taken place. Same for game 3.

This was on android.