Nice! having a quick look at it and it seems to work. One thing I noticed tho, with the one you used to test it, you have 'x' + stacks, if you make one that just uses the "stacks", without any kind of symbol or word, it will not appear, tho simple fix is just '' +, leaving it blank.
Is a setting in Yanfly not Luna? We double checked and Yanfly has a tutorial for it.
We'll check Auto Passive States again but we know it worked when we tried it out.