H9Combo Stutter on Live TV and Playback

[A&S&O]

This started a couple of weeks ago - watching live TV (terrestrial freeview, any channel) or playback via wifi, picture freezes for a second, then rushes to catch up. Happens again a few seconds later. Sound is unaffected.

It was intermittent - problem one evening, no problem the following evening - without any changes being made to the box. Now it is constant.

I have since upgraded VIX to latest version, but it has made no difference.

Any suggestions?

Box was bought in January 2020.

[A&S&O]

I found the problem - it was caused by me. I'd left a webpage to the box open that was refreshing the screen every second - the box couldn't cope.
I was led to it by a different thread. When I disabled the network, playback was fine. Re-enabled it and the problem came back.
I've turned off the screen refresh option and closed the webpage and now all is ok.

Hopefully discovering my mistake will be of help so others.