Probably works like RO2’s Lockdown timer.

When the match’s attack stuck for a long time. Game automatically start a lockdown timer. To prevent a boring standstill match.
See also:
When the match’s attack stuck for a long time. Game automatically start a lockdown timer. To prevent a boring standstill match.
See also:
it would be better to lower it to 15 minutes in invasion, the attacks already lost at the start last 10/15 minutes, the only attacks lost at the start to reach 20 minutes are in Normandy in D-DAY / Ver Sur, when the Americans decide that it is the time to camp
Normandy Airfield RIP Allies, gl winning there now, also baloons are poitless now.
I think 10~15min per stage is enough. Even more hardcore RO2 controlled its match time down to 25~50min. Some mission of Enlisted can easily reach >30min.
Note: lockdown should only triggered when the progression bar hasnt changed for a long time. Not failed to capture for a long time.
It’s the time to get some limit for defenders.
This game has more and more restriction on attacker. And still 0 limit on defender is insane.
10 minutes is adequate, at least in Stalingrad, the Soviets think they are Vasily Zaytsev, they make the most boring games