M61 vs Tiger H1/E

Since when has m61 non penned the flat part of the tiger? I played a game today, non-penned and went into the armor sim thing and realized it says it can’t go through now. Literally since when has that been a thing, and I feel like either the jumbo or the tiger should get moved because that is super unfair.

The 75 jumbo vs the tiger h1 is very fair. Jumbo has much better armor and a faster reload in exchange for a worse shell

When did this change this though

debence from how far you shoot. From close range 0-100m it has 104mm of pen. (mm or not idk) 100-500m 102mm; 500-100 102mm > 100mm (90-80 mm). The tiger armor is only 100mm at 0°.
So at close range it should pen frotnally. Still dont get why you cant pen. Maybe the Jumbo gun is high and the hit angle is not 0° so it will not pen.