White patches on screen when working on full pack layouts. To remove it and view the artwork correctly, Overprinting Preview has to be turned on, but it makes working slow.
Kira, toggling Overprint Preview basically disables GPU. I assume View > Preview on CPU does the same, right?
To help the team to investigate this, can you share the test file and your exact specs (OS version, GPU model, its driver’s version), along with the screenshots, to firstname.lastname@example.org? Please also mentions the link to this report for tracking purposes (https://illustrator.uservoice.com/forums/601447/suggestions/46559017)