I think it might be caused by bugs after the update. Once after the update, I personally caught a bug when a squad of panzerfusers was displayed near each shelter or building in the game. Before that, this has not happened, so anything is possible.
Are there any plans to somehow rework the KV-2? In particular, the reload speed. Brumbar seems much better than the KV-2 at the moment, although it costs less ...