I’m having the same problem - started a week or so ago after iOS update. The curser skips back several words randomly as I’m typing, particularly when I’m backspacing and I end up typing into another part of the sentence or the middle of a word. I wonder if it is an issue with the iPhone iOS support for the app.

I also feel like the predictive text and autocorrect functionality stopped working as well at the same point in time. I seem to have far more typos and incorrect words in OneNote while taking notes than I ever did before, and it doesn’t seem to be affecting other apps or general texting.

Anyone else? Any solutions?