Spell check keeps highlighting words that are correct

[QQQ]

In recent months (not sure how many), I've been irritated by Word's flagging mispelled words and phrases that are actually correct. It seems to happen when something is initially incorrect and I make a change the sentence in some way that corrects it, but the red underline remains anyway, like a kind of zombie notation.



Only when I right-click on these zombie red-lines do they vanish. This is irritating because they clutter up my text with red underlines hanging on for no reason and I have to go through this pointless little ritual several times an hour in order to clean up the display.

I attach a couple of samples. When I right-clicked on both these red-underlines, they promptly disappeared. (Note that these are not grammar marks, which might come up on some function like a passive construction, but spelling marks, and there's obviously nothing wrong with the spelling. Anyway, they go away with a right-click before any change is made, so even Word knows they aren't wrong.)

I think this is a bug that has crept into Word's Spell Check function and I really hope the Office gurus can provide an update that fixes it. But it would be great if anyone knows how I can make it stop on my side.

I'm using Microsoft Office Professional Plus 2019 (Version 1808) on automatic updates through my university, installed on a new Dell Latitude 9510.

Word spellcheck error 1.png

Word spellcheck error 2.png