Can’t communicate between wireless bands on a satellite

Yes main wlan (IoT and Guest are switched off). I could open up the IoT and put something on it I guess, I'll come back to you on that!

 have opened up a case with support and hope they are reading this thread since I sent it to them. The last advice from them I got was to hard-reset and then re-sync the satellite (ie set it up like it was brand new), which didn’t make any difference. 

Thanks for testing, I'll be interested to see if it’s different on another model.