This bugpatch did some confusing stuff. Now, even activating the "tank only" ability the ZiS keep shooting infantry - didn't test with other models or other factions to see if that ocurred consistently.
Also, I had some bad RNG, or something changed with the soviet anti tank grenade or the panzer IV, since I threw it a lot and got a lot of bounces.
This patching work of Relic seems like they are trying to dry ice with a piece of cloth - there's always something appearing after each update
