I had a similar issue this morning with my brand new K95. I had bound G3 to Open File Explorer, but the Escape key was doing this as well, even though it was clearly unbound in iCUE. By removing the Open File Explorer entry I'd created in the Action Library, the problem went away. When I recreated it in the Action Library, even if I didn't pull it up to an Action or assign it to a key, the problem came back. Weird.