Has anyone here experienced or suspected that the Vodafone TV set top box (T-Box) causing TV's to freeze?

I had an issue with my Panasonic P65VT50Z Plasma freezing. I have tried the following....

Reset to shipping state
Changed HDMi ports (rebooting after each change)
Changed HDMi cables
Turned off all the Viera Link settings.

I have no issues with the Chrome Cast or the Xbox One. If I say switch from onboard tuner to Xbox all is good, if I switch from TV to Vodafone TV I will get a freeze.  The same can happen
when switching Xbox to VF TV.

Some days on start up it will freeze when the HDMI source begins to appear (Input name flashes up) and it appears to be associated with the VF TV. An issue I have is it can go for a few days with out a
freeze, so when I have tries to run the TV without VF TV connected I have not experienced a freeze but that may will be coincidental. Its almost like does the light go out in the fridge when closed.

When the TV freezes nothing responds to either remote or the controls on the TV. The LED blinks that a command is being received but no action. The only way to resume is to disconnect from the power
source. The TV is not hot and neither are any of the attached components. as all are well ventilated. The TV is not showing any other issues and preforms as new.