I have the same problem here. Never had that before.
Has probably something to do with the Logitech “Gaming-Software”?
I’m nut shure about this. But i think it started after i installed the Software for my new X52Pro.
Even when the X52 is not connected, the Eyetracker does not work.
I’ve to remove the Eyetrack-App, reinstall und then everthing “starts” to work. But also the Logitech-Software seems to start over (display on my G19 gets black und shows then the normal picture)….