clipping mask Bug/glitch
Hello.
I'm using illustrator CC (25.1) and MacOS 11.1.
When I use clipping mask, sometimes Illustrator shows a duplicate shape of that mask or shows what's inside the clipping mask (that should be hidden). When I scroll through the artboards, the clipping mask start to blink like a glitch effect.
If you look the at the attached files you can see at the top, a clipping mask with some brown shapes inside. When I scroll down, another rectangle shows up.

Hi All,
Thanks for reporting this issue .We are unable to reproduce the issue at our end and would require help from your side to debug this issue and do an in-depth investigation around the same.
Please share the following details :
- Machine\OS details
- Files with which the issue is reproducible
- A small recording of the issue
Warm regards,
Illustrator Team
-
I wonder if disabling GPU Preview helps
-
Simone Marian commented
I also have constantly this problem.... very annoying. It all started when I update illustrator to the last version 26.0
-
Denis commented
Problem is very actual! Windows, 25.4.1
-
Ramona H commented
i get the same thing but also just for filled, solid shapes (closed). Also things are constantly looking like they are not clipped in some areas....extremely annoying.
-
Anonymous commented
I have the same problem. clipping masks change when I zoom in on the artboard. Glad I'm not the only one! (Illustrator v 25.2.1, Mac OS 11.1)
-
Leigh commented
I have an image with a clipping path which works in Illustrator 24.3, but turns all white in Illustrator 25.2 Could be related to this clipping mask bug. Running macOS Mojave.