Parts of video with applied effects are "shaking" after exporting
Hello, I am working on a bit longer porject of about 30-45 minutes in Adobe Premier elements 2018. I am dividing the project into smaller segments of 5-10 minutes so the program would not get overloaded. First couple of projects came out without problems, but from the third one onwards I have noticed that certain problems, despite the fact that I did not change anything in the project settings (I am exporting them all in standard settings for .mp4 1920x720, 24 frames). During the preview phase there are no problems, but after I export the file, parts of tthe video are "shaking" up and down (just a few pixels but enough that it is noticable). The parts in question are photographs on which I have added basic effects (some small tweaks in position and scale). I have tried to shorten the segments even more - on just one or two photographs but the export result is shaky again.
I am very grateful for any help you can provide me
Thank you in advance

