I have played a few different matches in battlegrounds, and it seems that the turn timer is incorrect.
You can still se the clock tickin/rope burning, and the i suddenly cuts to the combat phase.
The recruit phase turns into the combat phase 3-4 seconds a head of the timer. This number seems to go up during the game, so that in the later part of the game the recruitment phase is 10-20 seconds shorter.
For me it didnt seem like it was comsisten, some times i lost 15 seconds on a recruitment phase other times i just missed out of 5-6 seconds.