iPhone puts Facetime gestures into iMovie??

I'm using my iPhone 14 (iOS 17.2.1) to film video clips of me painting. I use QuickTime to record & save my clips, then import them into iMovie (v10.4) to edit the clips into a video to post to social media. My problem is while I'm recording, my iPhone is doing the FaceTime gestures thinking the way I'm holding my paintbrush is a thumbs up or down and QuickTime records these. I then have to edit these out of iMovie - I don't know when they happen and I can't go back a day later and redo that step of the painting. It's annoying that I may have to edit out a clip that is very instructional to the point that it is very obvious that I edited the clip because it will start out with me painting then *snap* the painting is done, skipping over the point I wanted to demonstrate! And I can't find a setting in QuickTime or iMovie to ignore these annoying gestures. I think I found how to disable it on my iPhone but between the 3 of these there should've been some sort of correction to accept gestures or not.