Illustrator has a font cache?
I have a project where my client wants me to use Source Sans Pro. If I delete all of my Source Sans Pro fonts from my Win11 fonts folder and only use Adobe Fonts, then I get font warnings for Source Sans Pro Semibold, as well as a few others, and when I try to use Find Font, I see that my system seems to have five installs of Source Sans Pro Semibold, as well as four dropped font-warning entries. If I deactivate all Adobe fonts and install .ttf back into my Windows Fonts folder, then I get all twelve fonts I'd expect, as well as a second semibold face with an asterisk indicating that it is missing.
It doesn't seem to matter if I am working in InDesign or Word or whatever, Source Sans Pro seems to work just fine, with no missing fonts or errors or doubled (or quadrupled?) fonts.

I have tried quite a few permutations of uninstalling fonts, deleting Windows font caches & stopping the font cache service, signing into and out of CC, activating and deactivating fonts on fonts.adobe.com, with no real change in behavior.

So, each time I open a file (twelve languages, twenty files per language) I have to do a font-replacement rigamarole that has to be redone every time I save and reopen the file. Can any of you folks suggest some kind of troubleshooting or font-cache-clearing that I maybe haven't done yet?

