Game Crashed in Ultimatum Mapping

It's really annoying to be constantly crashed and sent to desktop at every round 8,9,10 for every 5 T17 maps. All of my settings have already been adjusted and reduced from default to low to ensure smooth graphic and better performances.
No flashy MTX nor explosions yet I still crashed so often every hour.
Game only crashed when in Ultimatum

Logged in again and already crashed near the end of round 10 on the first map

The most obvious suggestion would be to verify game files as it sounds like it's trying to load some asset tied to ultimatum, and crashing when that fails