will do, i'll attempt to strip it down to just what causes it, first. thanks for looking.

I found the culprit: Mod Menu
I'll have a look if I can fix this on my end.

I created a work around. It's not the prettiest thing but goes around this by pushing the button down by 12 if the modmenu main class is detected. At a later point I will look into adding support for the menu.
This "fix" is available now with 3.7.7

this seems to be a mod conflict. I am not able to recreate it. Can you give me a list of your mods?