In the event that the game is forced to stop or there is a disruption in communication with the server mid-match, you will be able to return to the match during the draw phase or the main phase of the following turn once the connection has been restored.
You cannot return to battle during the final turn. Instead, you will be returned to the home screen with the results of the battle reflected.
If your connection is disrupted in this way more than once within a single match, it will result in an automatic concession.