I wish to understand the sorcery at work behind this shot

I occured during a close range (300m) duel on Vietnam.
My tank was an M60 TTS firing an DM33 APFDS at their XM803. I shot at his front wheel while he was angled, nothing out of the ordinary.
And yet, the shot, in spite of registering properly, showing the Xray animation, traversing the crew compartment and delivering massive spalling, did absolutely no damage.
And I mean no damage at all: nothing to the track, front wheel, fuel tank, let alone the crew. He then casually reversed back into cover.

The shot analysis screen is just as baffling.

This is where the shot entered:

Just like in game, the side armour is perforated right behind the fuel tank:

The crew gets a free confetti shower:

This is what should have happened:

Would this by any chance all be because this shot was never actually validated by the server, while somehow being fully validated client-side? This would be very silly.