On the Crusader Mk II, british spaa at 3.7 there’s 2 armors colliding on top which slightly duplicates the armor on that region (from 40 to 80 or sometimes 140), however doesnt do much to higher caliber shells that just tear thru. However, it’s still a small glitch that could be fixed, I don’t really mind.
(you cant see it in the image but when you move the 2 layers just start glitching and overlapping, basically just z fighting like any other game)