I need steps to reproduce it and videos demonstrating it because it's not something I can reproduce, not sure what I'm supposed to do otherwise
I deeply apologize for not investigating the core of the problem properly before posting it as an issue. I have managed to narrow down the main culprit of my problem.
In this link, you will be able to see that ADS from High Ready is a little strange, having a weird cant before rotating to the correct orientation.
In my attempt to make it less obvious, I adjusted the "High Ready Reset Speed Multi", which caused the weapon to not return to the active aim original position. I changed from the default value of 6 to ~40-50 and the issue I described in earlier posts would appear. Adjusting the z-axis position only amplified the issue and not the issue itself.