Could be down to your box not been able to handle the streams how is your iptv setup without posting line details is it particular hd sports channels fhd channels sd sports channelsits IPTV, its 2s mate
I thought I would thank you for this post, as I have had a 55inch 4k 3d for five years now and when you switched it on the picture had a meteor tail like effect with fast moving scenes and the only fix was to go into 3d go out to 2d and that sorted it for the session but soon as you switched off and back on you had to repeat the scenario, also having two H7s and a droidbox attached on hdmis you had to do the same!! every time you switched hdmi , I switched the motion plus off and it has solved the problem, can't believe I didn't find a solution sooner, the manual is the size of a 1970s yellow pages and I contacted the makers twice!! Cheers again.I found that turning auto motion plus off in tv settings sorted mine
I found that turning auto motion plus off in tv settings sorted mine