Keycommand for "Select" doesn't work

I often need to activate/deactivate mouse input. Therefore I tried to assign a key command for it. But all keys I tried, don’t work. The key I assigned is always shown with blue letters. And I take care that the key is not also used for another command. I’m working with macOS 10.14.6 on a MacBook Pro. What I’m doing wrong? Is it a bug? All other key commands are working as expected!

I can confirm that on this mac I can’t get the Disable Mouse Input shortcut to work either (and I can’t immediately see a function to Enable Mouse Input).

It’s not a bug, but rather an assumption that this particular command will always be driven from the UI. However, it should be easy enough for us to change, and I’ll look into doing this for the next version.

Thank you, Daniel!