I have had this on going problem with both the Pitch II real time plug in and the EQ 7 band. The parameters sporadically reset themselves during playback and or when closing a session and reopening it. The Pitch II is much worse. I have tried just about everything to diagnose why this is happening. I have 3 PT setups that i work with. 2 at work and 1 at home. All on Macs, 12.7, 12.7.1 and 12.8.3. I haven't tested the 12.8.3 system yet as i don't use it often, but both my 12.7 and 12.7.1 setups suffer from this. Ive tried new sessions, deleting preferences, drawing physical automation, reinstalling pro tools, and reinstalling OSX. Even with the coarse drawn in at -6 for example, it still snaps back to 0 at playback. I have double checked to make sure there was no automation points hidden anywhere.
If anyone has any tips here they would be much appreciated as i really on pitch automation quite a bit. I use the none real time pitch legacy often but would like to have access to real time adjustments as well. Here is a video showing what happens.
https://www.youtube.com/watch?v=oKF7H6WEnZg