As shown in the video, when a gun grenade collides with the ground or walls of a building, it cannot cause damage normally and can penetrate the tank model, causing damage to the tank (I am using regular gun grenades). The official definitely doesn’t want the game to log in to Steam with so many bugs, so please fix it as soon as possible.
https://community.gaijin.net/issues/p/enlisted/i/lLnAGZVmJlB7