Issues with "missing font" that is not missing
Hello!
My document has been behaving inconsistently every time I open it. Sometimes there are no fonts missing and other times some or most instances of Avenir are missing. One of the times it showed Avenir missing, it showed Avenir book listed twice.
I haven't added any changes today but have been opening it throughout the day to try and understand what is going on.
Also, whenever I open it, it shows as unsaved even if the missing font window doesn't open up. Then sometimes if I save it, wait a few more seconds without adding changes it shows as unsaved again.
Recently, when I opened it, it showed the pink highlighting on the font without showing the missing font window and all of the "missing font" was weird symbols for a couple of seconds.
So far I've reset InDesign preferences, saved the document as an IDML and resaved as an INDD, validated Avenir in my font book and checked for duplicates of Avenir but is showing no duplicates in font book. I ended up deleting AvenirLTStd from my font book in case that was considered a duplicate but it still acting weird and inconsistent with Avenir.
I also tried opening a packaged copy from another older computer and it showed a pop up of "Adobe Garamond Nothing" missing and "Avenir nothing" missing but then didn't show pink highlighting.
I currently have Big Sur 11.1 and InDesign 15.1.1 and have considered upgrading to the latest version but am afraid that could affect something even if I revert to the old version and read that people have had missing or duplicate font bugs that don't get fixed with an upgrade. (but not sure if this is a bug or something I am doing wrong)
Any ideas on how to solve this?