Why does it jump?

I import a video from youtube, edit the transcript and when I click the ‘save and open’ button, the mouse pointer jumps a few inches above. I have to bring the pointer back again to save the lesson which at first I thought was tolerable but now it’s starting to become an annoyance. jaja.

This quirk started a few weeks or days ago, not sure.

Anyone experiencing the same thing?

Seems fine for me. Which browser are you using?

I’m using Firefox.