It’s still not fixed in 14.0.10
Here’s my thread on the same issue: https://forums.steinberg.net/t/cubase-14-undo-mixconsole-step-slow-laggy-behaviour/949390
I don’t understand how problems like this can get through beta testing. I found the bug after 3 minutes of using the new version. It’s just “undo,” not something crazy complex.