Ok. Well, then you could abandon Fira Sans from activation on Adobe Fonts altogether and switch over to Google Fonts where you can download font files and install them on your machine. If you package an InDesign document the Google font files will be packaged as well to a Document fonts folder you can distribute.
Font files will never change in a sudden.
But before you implement font files for Fira Sans test if they have the amount of glyphs you need. Do not do that with the Glyphs overview at Google Fonts; only a subset of the glyphs is visible there. Instead install them on your machine and walk through the Glyphs panel in InDesign.
Regards,
Uwe Laubender
( Adobe Community Professional )
I used Google Open Sans in a previous brand and I couldn't redistribute it - always just had to send people to the download page anyway lol. Or Adobe Fonts. Afaik there were no issues from that though. I HOPE this kind of thing is rare!
For now, for this, I've switched to Meta Pro, also out of Adobe Fonts. Having been let down, I'm immediately back for more. All I know is I definitely don't trust Fira Sans to work consistently across users and machines, if I have this issue on the same PC after changing Adobe accounts. Plus I just grabbed Meta Pro standard and condensed, it's a lot simpler than Fira, maybe inherently less trouble, and basically identical looking.
And Adobe Fonts just needs to work! I sort of get it that you could run into issues the old-fashioned way when there's 4 million versions of Arial floating around, but we're talking about everything coming right out of Adobe and there are version issues.