Red color bar displays intermittently in Illustrator 2020 on macOS

[raymondh93818467]

AI 2020 turns on the overprint preview function and then turns off, and the software interface sometimes displays a red color bar.

{Renamed by MOD}

[Srishti Bali]

Hi Raymond,

Thanks for reaching out. This looks like a display issue. Could you please check and confirm how it looks if you turn off GPU performance from Illustrator preferences. 

Go to Illustrator > Preferences > Performance > Uncheck GPU performance.

Also, please do share the graphics card and operating system you are working on.

Regards,

Srishti

[raymondh93818467]

Hi Srishti,

Thank you for your help. I also know this method, but I don't want to avoid the problem by reducing the performance. I hope adobe can fix this problem as soon as possible. My computer system is macOS 10.14.6, and the graphics card is AMD FirePro D500 3 GB graphics.

[rudybett]

I have this problem too, from one year more or less... 

When i open a file that is previusly saved whid enabled overprint, and then i disabled it, the red bars appear. Also cursor is out of alignment.

I have macOS 10.14.1 and AMD Radeon R9 M395 2048 MB. Illustrator version is 24.3.

Thank you in advance at all!