I was told to put the dongle in a laptop, play a radio station on mute, ethernet from laptop to box, it will
give a better connection to the box and stops the glitching.
Apparently this stops the connection dropping out as there has to be a small constant feed for the radio.
The box on it's own tries to connect intermittently, hence the glitching.
Not tried it yet, will give it a go in the caravan this summer, as I was getting glitching using a travel router connected to the box, kids could
use their Ipads on WiFi that way.
It hardly uses anything in the way of data.