Bug of saving in the background of Illustrator 2020
If you save a document that uses a 2-byte spot color name in ai format, place this file in InDesign, Illustrator, etc.
It will be replaced by "Global color". And even if you export the PDF, it will be reflected. Turning off saving in the background can work around this, but this is an issue that should be resolved as soon as possible.
I am happy to share that we have fixed this bug in our latest release – 24.1.1 for Win and 24.1 for Mac which is available worldwide now.
Going forward, our goal is to fix as many top User-Voice bugs as possible and as frequently as possible. Given the nature of the fixes, some of the bugs will take a longer time to fix, but we are on it.
You can update to the latest release using Creative Cloud desktop App: https://helpx.adobe.com/in/creative-cloud/help/creative-cloud-updates.html
Thank you for all the feedback. Keep it coming!
This bug is very serious because it affects all non-ASCII language users. Should be fixed immediately.
If non-ASCII characters are included in the spot color switch name, the color name is automatically changed to "Global color" on the PDF side of the Illustrator file. This occurs when background save is turned on. Does not occur if background save is turned off. This is probably a bug in the background save function.