combining characters changed colour

I'm using an up-to-date version of Microsoft 365 for Mac. As of yesterday, combining characters are showing in red. These are Unicode diacritic markings that are part of the font, and are added above or below main characters. This is not simply a display issue. The characters also export and print as red. The solution is not in the regular colour selection menu. I've tried that.
How can I get them to return to black?

Please see attached screenshot.

I've noticed that somewhere in the Word Options (accessed from the
bottom edge of the panel opened by the Office button) that there's a
checkbox to check that looks as though that might be its effect. (I
never wanted to risk trying it, and I can't think of a good reason for
having it,) It's probably under "Advanced," but it won't take you long
to look through each of the main categories.

I can't imagine why it would have accidentally turned on.

On Saturday, December 19, 2020 at 3:31:07 PM UTC-5, jason_1979 wrote:
I'm using an up-to-date version of Microsoft 365 for Mac. As of
yesterday, combining characters are showing in red. These are Unicode
diacritic markings that are part of the font, and are added above or
below main characters. This is not simply a display issue. The
characters also export and print as red. The solution is not in the
regular colour selection menu. I've tried that.
How can I get them to return to black?

Please see attached screenshot.


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