Pen button inputs are ignored

Hey all. I need some help.
As a lot of us know, the undo hotkey is a staple for creatives, and for me, it's been so much so that I even have an input for Ctrl + Z on my pen.
Unfortunately, Animate doesn't seem to like this, and instead always defaults to inputting a right-click instead of the desired undo action.
Has anyone else run into this problem?
Does anyone have a fix for this?
I have tried using both a 2nd Gen Bamboo Ink smart stylus as well as the integrated pen that I use with my Lenovo Yoga 9i. Any help on the subject would be appreciated.