Motion Blur keeps doing this to some of my frames, even when I don't move erratically. How to fix?!?

Hello.

I am currently using cycles on Blender 3.0, and as for camera animation, I actually use motion data from my phone.

Now, for some reason, in my renders, I keep getting weird, unusual motion blur artifacts in select frames. Ones that I do not move erratically in at all.

Changing shutter settings doesn’t seem to do anything besides overall lower motion blur’s effectiveness as a whole.

See images below:

Please help me.