InDesign Solid color coming as gradient color after upgrading to macOS

[Titanuim]

I don't know what this is.

I upgraded macOS this time.

When I using a spoide Tool. sometimes.

I don't know why it's taken in a gradient color rather than a solid color!

Help me!
<Title renamed by moderator>
I try UXP / CEP Delete ..

[kimgaru]

Mac M1

try cleaner tool and reinstalled

This is not a problem specific to a particular document.
Even within the same document, there are times when it works and times when it does not.