Weird comment highlighting issue

I’m working on a doc that has comments/annotations, which are highlighted and underlined. When I want to address one, I delete the comment in the inspector pane, which makes the highlighting/underline go away. But then often when I edit the text that was commented, the underline reappears on certain words. My workaround is to cut the entire block of text and then paste without formatting, but that’s pretty annoying. All of this is in composition mode, I haven’t tried to repro in the normal editor. The comments originated by importing a Word doc from my editor, not sure if that’s important either.

This is on 3.1.5 on MacOS.

Thanks, that’s definitely the same issue.