Hi there,
Sorry to hear about your experience. I hope your issue is resolved now. If you still have issues, please share version of OS & Illustrator? Please make sure you have updated your OS & GPU to the latest version.
If you still have issues, we'd appreciate if you can share a small video of your workflow so that we can try to replicate it on our end.
Looking forward to your response.
Regards,
Ashutosh