Phantom device switching

My TKB TZ68E mains plug switch is switching on and of randomly. I have removed it from all scenes and LUUP code. I unpaired it and re-paired it, making sure it was not used in any scene, etc. I bought a new mains switch to replace it, thinking it was faulty, but I’m still getting the problem.
It switches on & off at random intervals. The Vera app shows it switching also.
Has anyone got any ideas?
My controller is a Vera 3, running UI7.

Have you checked the My Modes in the Dashboard settings area, maybe the house modes are switching it.

I’m not using House Modes, so it can’t be that