Automation effect is happening a little of a half second before it should be. I've tested this with built-in and external effects. I've attached a gif of a loop that has effect mix set to 0 percent via automation until after the clip is has ended. You can see that the mix is going to 100 percent well before it needs to.

I am on a 2020 Macbook Pro M1 and on the most recent version of Audition. I have recently updated to Monterey which is when I noticed this bug.