Fonts changing in files when opened in Illustrator 29.5.1

Downgrade to version 29.4.

I´ve had the same issue for a month now, and I´ve changed manually the fonts but it keeps changing enverytime i open my file. How can i solve this problem?

Anubhav M  ==>  Users are still reporting the random font substitution bug in Illustrator on the Mac and on the PC, in versons 29.5.x, 29.6.x,  and 29.7.x,  from all over the world, with translations even required to read the posts from users in Spain and Japan for example.... and the Adobe team can not replicate the issue in San Jose after a couple of months worth of worldwide input?  I think that I can speak for the world when I say that's quite unfathomable.  How about this: fly three or four of us out to San Jose and put us up at the Westin for a few days, and we can bring the Illustrator random font substitution bug to you at Adobe headquarters with our multiple windows laptops and Macbook Pros.  You will then be able to replicate the issue in spades on your end, and just maybe find a solution. 

Hello everyone,

We are sorry for the trouble. We are having debug sessions for this issue with the product team, as we are unable to replicate the issue on our end. Would it be possible for you to have a debug session with us? If yes, please share your Adobe email ID, Phone number with country code, preferred time & day for the meeting, your timezone, and country & state you live in over the DM only.

I will be looking forward to your response.

Anubhav

A última atualização fez com que as fontes dos meus projetos fossem alteradas, não preciso nem dizer as centenas de horas que precisaria para corrigir todos eles. Queria saber se há algum movimento para corrigir este absurdo.

Same problem here, I need to spend another day just to fix all the fonts on 14 labels that have a lot of text information 😞
Adobe Illustrator has had lots of bugs lately; maybe it is time to start learning CorelDRAW (Go back to the Stone Age) 🙂

Hello everyone,

Our team has requested additional info. Could you kindly share a link to a sample file with this problem after uploading it to a file-sharing service, so that we can check it on our end?

Note: While sharing the link, kindly ensure it is set to Public and the option for Save a Copy/Download is enabled.

Looking forward to hearing from you.

Anubhav

Exact same thing happening to me. Working on a master file with dozens of labels and all two families of fonts that are properly installed changed once to gibbrish (I had to renter text using the glyphs window!) worked well for a while, did it again and was fixed, then re-happened a few days later and was fixed just by restarting the computer. But what a waste fo time! This moning, same doc, it replaced two families with Myriad. I did a Find/Replace, only to find out that text on other locked layers has randomly dispeared in preview. Come on Adobe, you can do better than that, instead of fiddling with AI please let designers do their work.

I'm hoping to get some advice. I work with very large and complex packaging files with many different fonts. When the bug-infested Illustrator completely ruins them with it's font substitution bug, my life turns into a nightmare. I can't stop working, but I'm terrified this will happen again and I'll lose yet another day trying to fix it. So, I'm hoping to get some official advice from Adobe as to which version of Illustrator (if any) does not have this issue. Please advise.

This is still happening for me in version 29.7.1