Anyone notice additional inconsistencies with heatfs since the recent update

A couple days ago i unlocked the m47 patton and then the heatfs that came with it on the us tech tree. I had already unlocked and aced this tank on the japanese tree about a year ago. I have noticed a lot of shots that should pen simply do not. For one game, I could not pen a kv-220 shooting the turret ring, the flat part of the turret cheek, the hull. Then when aiming at a t26e5 in the same game at a downward angle the shot did not ricochet as expected but still failed to pen even though it should easily go through. Then, when shooting a m55, i penned the first time but the second round at tye same point hit and did 0 damage whatsoever. I want to make sure I am not going crazy, because having played m47 before I never noticed issues as bad as these

I nonpenned a M41A1 with the Pbv 501, but it was a massive skill issue on my part

I played the JP M47 yesterday and was struggling hard with penning the maus side on and turret cheek, but then the Heatfs on the AML90 and Ratel 90 is working fine so idk.

I wonder if the specific heatfs round is malfunctioning, the m46 patton ises an older heatfs round and i didnt notice any issues penning the same tanks like is2s, tiger 2s, other pattons etc