Fonts missing on a shared document.

Hi all!

I have a recurring error that's been bugging me for a while now.

Mac Catalina and cc updated to the latest version.

Sometimes, in a specific file that gets constantly updated, indesign won't see some computer fonts. Just to clarify, they aren't user fonts. Basic stuff like Baskerville, Helvetica Neue, Times.

It happens on every terminal we use (three different macs). Not always, but at some point if I work at it for a few hours it'll pop up.

One workaround I had is to disable one of the incriminated fonts from the Computer Fonts, and enable it on the User ones. And viceversa. Indesign will be happy for a while.

Using find fonts/replace all doesn't do a thing. I can see the incriminated fonts in the system fonts from the find fonts window, but nothing happens when I replace them.

I have a few paragraph styles defined, I tried changing their fonts to see what happens, but the issue remains.

I'm at a loss.

I'm pretty sure the file is the problem, something hasn't been done the proper way, but I don't know wheter there's a routine to try and eradicate the problem once and for all.

How do we proceed?

Regards,

EL