BUG (v14.7.0): DeHummer audio effect resetting upon exit
The DeHummer audio effect will reset to a flat line upon exiting Premiere Pro. So every time the project is closed and re-opened, each DeHummer effect present on your timeline will have to be redone.
This is present in Premiere Pro v14.7.0 (Build 23) on Windows 10 and is reproduceable on every system I've tested.
Daniel Toman commented
This bug is happening to me on Premiere 14.9.0 (Build 52), Mac OS X 10.14.6, Macbook Pro 15" 2019. The DeHummer parameters are deleted upon quitting Premiere. (They are not lost if I save the project but continue working on it after saving, without quitting.)