Mobile client will seemingly disconnect from server without realizing/notifying the user at random during matches. Happens at least during games of Brawl and Standard Brawl.
Mainly indicated by your own burndown timer appearing after taking an action on your own turn with nothing else on the stack (even playing lands can make this evident).
Closing and reopening the app fixes the issue temporarily, but it can happen multiple times per game. Unsure if this occurs on PC.
Willing to create/submit a log file for assistance if needed.