mouse sensitivity difference between killers. Am I crazy or is it actually a thing?

The mouse sensitivity has always been weird in this game. On killer the Y axsis (basically the up/down movement) has always been slower than the X axis (left ro right movement) speed, means turning your mouse from left to right is faster than turning it up and down. Even though it is weird I never really payed much attention to it, I only started looking more into this when I started playing more huntress recently and after way too much "testing" I feel like the mouse sensitivity is incredibly inconsistent in this game, let me explain:

So as I already said the Y axis movement speed was always lower than the X axis, now I tried every single killer in a custom game the problem seems to be different for the different killers. for example: on nemesis or trickster you can really really feel a big difference in speed between moving your mouse up/down vs. left/right but on killers like clown and trapper there is almost no difference at all, they almost feel like they both have a 1:1 movement speed for both axis, as it should be and as it is in pretty much every game.

The thing that completely threw me off though was when I loaded into a normal public game after testing, killers like clown or trapper that had a "normal" feeling mouse in a custom game feel different now, the Y achsis is slowed down heavily, killers where it was already bad in a custom game for them it's even worse in public. So that means there is a difference in all the killers Y axis camera seinsitivity but ALSO a difference between custom game and public game Y axis sensitivity. like what? how is that even possible?! I am 100% sure that it is like that.

Is anyone else experiencing this? I think some people probably have always noticed that the Y axis movement speed is not on par with the X axis but does anyone else notice a difference between the killers and between public and custom games? Survivor camera sensitivity is perfect, this only affects killer for some reason.

(I have nothing changed in my config besides Vsync off and FPS uncapped. so I don't think the issue is on my end)