While typing text, the cursor jumps back to a spot already typed

I have an iPad Pro 12.9” (5th gen) and a Magic Keyboard with touchpad (2nd gen). I spend lots of time typing in Pages and Mail, and the cursor jumps around in the text, moving my insertion point. I am not brushing or clicking on the touchpad (I don’t think)—yet I find myself typing in the wrong place. I have tried to find a way to adjust the touchpad, just to be sure that I’m not hitting it unawares, but there does not seem to be a way to do this on the Magic Keyboard.

Is there something I could be doing that moves the cursor without my knowledge? Is there a way to disable the touchpad or turn off shortcut keys that might be redirecting my cursor? Is there some way to make the touchpad and/or keyboard less sensitive to that kind of inadvertent redirection?

Basically, is there any advice you can give me on controlling cursor movement? As a writer, I find this annoying, and I’d gladly give up other time-saving features, like shortcuts, to stop it from happening!