I apply warp stab to some nested clips, 3-5 sec each, speed was reduced 50-45% (60fr to 30/24fr.) Everything is smooth. Then I just export the project (2min length) save it, and close. When I open it again in a couple of days to make some edits all the stabilized/nested clips are jittering and twitching. Deleting and reapplying a warp doesn't help. What works is only getting all the clips from the nests, putting them into the nests again, and reapplying warp to the "new" nests once again...and everything is running smoothly again. Guess what happens when that project is saved and is opened again?! It's an endless cycle. What am I doing wrong?