The only idea I can come up with now is maybe your mouse drivers need an update or a rollback
sorry but i feel like ppl not reading the issue…
i made clear, checked and proved that it cant be a problem with the mouse nor the driver, since i can use both mouse buttons regular in the inventory, other programms, or for the other hand.
Now something happend, i had a few disconnects from server (Error 27 or something)
After i reconnected the issue is gone! =)
If some developer or admin did something: thank you very much, i hope you found the problem and can maybe fix the relating bug (if it was a bug)
Finally i can play fine again^^
Granted everything else acts as normal but the driver could be only screwing up with boundless
Edit* didn’t read further to realize this was solved. Epic exploring!
I am having the exact same bug. my character will not stop using the right hand item no matter what I do.
I ran a admin level cmd “dism /online /cleanup-image /restorehealth” and it seemed to resolve the issue.