Odd VST instrument behaviour in 12.2

I have noticed in 12.2 that when I have 2 instances of Komplete Kontrol loaded, the second instance will not display the editor window. The instrument plays the loaded patch all ok and I can see it in the workspace menu - just no editor will open. This behaviour is the same for instances of EZ Keys.
Anyone with similar issues?
When I go back to Cubase 11 all is fine!