This is a PD14, PD15, and PD16 problem.

I create travel documentaries. Often I will zoom in on a map, move to different locations and end by zooming out. On the video track this requires many keyframes to be set for the Position and Height/Width. Often when I want to go back and correct some of the keyframes, e.g. changing some and deleting others, the original settings revert back after the change. For example: when I delete one keyframe then change the preceeding or following keyframe, the deleted one immediately reappears, and the changed keyframe reverts back to the original setting. Saving and reopening the project has no effect. Saving the project, closing PD, restarting PD, and reloading the saved project nas no no effect. The only way I can continue is to reboot the system. Then I can make my changes and they remain set.

In my latest project, this has become a major irritant, since it takes up to 5 minutes to restart the system. Paul C