Similar to the bug a few months ago shells can ignore armor if you move while getting shot at. I have seen people talk about how happens with autocannons but not full caliber shells.
https://community.gaijin.net/issues/p/warthunder/i/jeu9cizCiEJ2
Text copied from the bug report:
Every type of ammo no matter the penetration can go through even the thickest armor plates if the tank that’s being shot at is moving at all. In the videos below the AMX-50 Foch which has a line of sight thickness of over 300mm got penetrated straight through the front plate by The T32 (APHE ~220mm pen), T92 (HEAT ~250mm pen) and Flakpanzer 341 (APHE ~80mm pen). This is similar to the bug a few months ago that had shells ignore armor when the tank was driving forward but it’s not the same thing.
Spoiler
Spoiler
Spoiler
If you noticed this too please say so on the bug report site so this gets recognized.