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I'm a 3d general Artist, I have experience with 3D modelling, UV unwrap, hight-poly/low-poly asset, and I know how to use Krita/Photoshop

Yes they are. Well for the most part. There is also soft push gradient (not really the hitbox, but like a softer wider hitbox) and also some logic that tries to push if two bodies already overlap.

Haha! Will check this tonight

Can't tell in from the picture, but it's also very possible that the elephant here was stuck at this angle due to the ones pushing on it's butt... But this should happen less often, and elephants should be able to unstuck themselves sooner now. You can also enable "UnitMotion" in dev overlay to display the path, this can help figuring if it's actually a pathfinder weirdness or a bug.