Zoom Region - screen shakes

Hello,

I'm having a problem with the Zoom Region function that I'm using in an application course. The training is made up of several short videos that I use on the screen. I have screens where I apply Zoom from the beginning of the timeline, and the video changes during the screen. At this point, the screen starts to shake noticeably. Do you know of a way to avoid this?

I should add that the problem is only apparent when I'm watching the training in Review. During Preview, everything works perfectly. The situation occurs in both Chrome and Edge.

I look forward to hearing from you and thank you in advance for your help.

Best regards,

Dominika