I had the same problems on multiple projects in the last days since I upgraded to 16.0 (I had to since I received a file from that version, and now same goes for the previous one). Fonts are activated on CC desktop and online page but still not showing on Indd (it doesn't "find them on pc").
Upgrading to 16.1 did absolutely nothing, I also logged in and out of cc multiple times and also rebooting etc and lost many hours because of this.
This is a major problem, and given the fact that I'm a paid-not-so-well-freelancer but paying every month my fair share of money to be able to work this is becoming truly frustrating.

This is still an issue for me, I'm having to copying all text from a large document into a new one because of project turnaround time.

InDesign 2021 simply will not recognise an open type font that has been installed on my machine for years and one that I have been using for our branded documents across other versions of indesign. Restarting my computer last week and getting the document exported before Creative Cloud sync worked but not today. Please fix urgently!

This issue has not been resolved with update 16.1. Im having the same problem, only having to revert to use previous versions. Please sort this out!!!

I'm trying to change fonts in ID 2021 and the menu says the font is the newly selected one, but no amount of forcing changes to the font styles makes them change! HELP

Had the exact same problem using newly packaged documents, system font (Baskerville) and Font Book- I've upgraded to v 16.0.2 and it seems to have fixed it. I was able to open those packaged documents and export them without the dreaded pink text. Frustrating me for hours before hand.

WTF, why hasn't this been fixed yet?!? It's INDESIGN...FONTS...major. I have so many Corona Virus instruction inserts to pass on to government agencies, but can't because of fonts. Ridiculous. Work is done, but can't do a thing about it.

same problem.

I have font issues when opening ID docs in 2021. All Adobe fonts installed fail and revert to ??? serif instead of Proxima Nova Regular. So very glad I did not uninstall ID2020.

I do not have time to monkey with this stuff which took me hours to get correct in the first place.

Bodoh betul, bayar mahal-mahal. Update je makin jahanam dokumen.

written in Malay language was deliberated

Same issue for me. I spent the weekend trying to fix a document that I've never had issues with before -- font is Chronicle Deck. I've also recently had issues with Avenir on other documents that have been fine for several years. More than frustrating. I'm using Font Agent.

same issue and is preventing me to work! I open a file I worked on the night before and fonts are now "currently unavailable on my computer" "Adobe Fonts couldn't find any matching fonts". Although, my fonts are clearly there via Adobe. I have attempted many fixes, closed ID numerous times and each time I restart, it can't 'find' different fonts or it found some of the previous 'missing' but still can't find the rest. No rhyme or reason and no consistency. I am using the latest version. The dreaded pink or attempt to substitute fonts is exhausting and frustrating!!

I have spent more years of my life than I care to remember watching Montserrat circling away in the Background tasks, never activating and blocking other processes.

We put a man on the moon in 1969 but if Adobe had been running the show, the activation of Montserrat would have prevented the rocket taking off.

Here we are x-amount of updates later and lo and behold...yikes! STILL HAVING FONT ISSUES! It's dreadful! Might be time to start looking for an alternative.

Same...ugh - font not working in InDesign - have the font in Suitcase fusion, fontbook and in the font folder in the InDesign app folder. Nothing is working!!

InDesign team this urgently needs a fix!!!

Catalina 10.15.7 and InDesign 2021 - Can't choose a new font without InDesign freezing. I can apply style sheets that have already been created, but not scroll through a list of fonts. I have uninstalled and reinstalled InDesign several times as well as updating Creative Cloud. I thought it was a communication error with DropBox but I've been working with that offline. Seriously crippling issue. Only solution is restart my computer - it will not Force Quit - but the problem persists.

Thank you so much for your detailed description of this. I am so hopeful this will be fixed in the latest update!!!
I HATE the "dreaded pink"

Found a fix as much as I don't like it. Missing a half dozen fonts in a large document that are activated through FontExplorer X Pro or through Font Book. (They work just fine in a new document; just not in my existing document.) Copied two of the fonts into the Fonts folder inside the InDesign Application folder to test the method. Now all the missing fonts load just fine. Just what I need -- more duplicated fonts on my iMac. - - Sue

Having issues with this too. Using the latest version, but Montserrat is apparently activating 6 times in Background Tasks. I've tried deactivating and deleting Montserrat through the downloaded file from Google and also through Adobe Fonts. Super frustrating.

InDesign 2021 16.0 tries to activate the font Montserrat black in the background continuously, every day...
This font not used on my open files. I have the OTF, TT and PS versions available on my machine although not activated. I use Suitcase Fusion Version 21.1.1.

The font is present but InDesign says it's missing. I'm at loss for what to do