Hello @mario71799581,
Thanks for sharing the details. While I check this with the team, could you update your Mac to the latest version of macOS (https://adobe.ly/3Gz1JKO) and see if it helps?
Also, try to run Illustrator under a different administrator account (macOS) and share your observations.
Looking forward to hearing from you.
Anubhav
Hi Anubhav,
I updated my system to 15.4.1 today. First the delay on the menus still existed under my Account.
But I also tried the suggestion to test it with another user account on my system. Here the delay did not occur and the menus opened smoothly. This leads me to suspect that something is wrong with my the Illustrator settings in my account.
So i tried reseting my whole Workspace - which fixed the issue i guess (For the sake of completeness: I use several monitors - I have several palettes on one of them.) The Submenus no open as fast as expected.
Thanks again for helping me out - and i hope this solutions can help others which are affected by this issue.
Best,
Mario