Also knows as RNG…eventually also skill/luck issues where players hit the stronger part of some tank (not this case in specific).
Gaijin doesn’t care what you (personally) hit or kill.
THAT SAID…i also get annoyed sometimes when a very strong shell is blocked by some specific “bolt” on the enemy tank…optic modules in particular annoy me a lot. BUT (and this is the important part)…I do realize that sometimes it happens when the fire at me…