Ok so I am very sure that volumetric is permanently broken, or this must be a bug, 120mm L1A2 APDS with 502mm pen can not pen an IS-3 side point blank

Community Technical Support Gameplay Problems & Advice
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I don’t need to explain, just watch the video.

Shot simulation:
ussr_is_3_120mm_l1g_766_russian bias again.blk (3.2 KB)

Can I report this as an bug? Seems this is purely insane and should NEVER be a thing.