Hi Frumlac,
Thank you for the reply. i just checked the UI & macros section and it sadly confirmed my suspicions that the prepatch indeed broke the functionaly of the RIGHT side ctrl, shift, alt modifiers:
This is a serious issue as now we cannot make use of the right side modifiers. I have many macros with rshift & lshift for example that do very different actions depending on which shift is pressed.
Also This on US forums: It is conformed to be broken:
https://us.forums.blizzard.com/en/wow/t/shadowlands-macro-api-bugs-improvement-wishlist/618955/9