Hey there @flixyyvfx! Welcome to the community! This is quite odd! Kind of looks like the physics are ticking out of sync with the frames. This only occurs if your camera is attached to a moving vehicle or the same if you move concurrently say with a sequence? Is it only the takes or is it that way while just testing in editor as well? Do you have Tick Physics Async on in your project settings? That should be off in this case.
you’d already tried my original thought, which was to lock the frames.
A couple of things to play with:
Head over to Project Settings → Engine → Physics and play with Max Physics Delta Time and possibly enable substepping.
Let me know how things go!