I’m having the same issue. Unfortunately I can’t really disable extensions in my use case as I develop in devcontainers and need the Dev Containers extension to do so.
I did disable all features and extensions in my devcontainer and still found the issue to be present.
Interestingly though, the issue disappears the moment I open the Process Explorer window. I’ve tried this multiple times, and given Cursor enough time after starting to ensure it wasn’t a coincidence. I’m able to type normally in the commit message box the moment I open the Process Explorer window.
After further testing it actually seems that it’s the moment I open the Command Palette that it fixes the laggy input, not when I open the Process Explorer. I reenabled all features and extensions in my devcontainer and found the same behavior. The laggy input in the commit message box disappears after opening the Command Palette for me. Could work as a temporary workaround until the issue is resolved @paulmontreal .