LG tv help

[ICallCustard]

Hi all,

Wondering if someone can help,

I have an LG 4K LED tv and have noticed on viewing both SD and HD channels the tv seems to flicker as if it is auto adjusting the image.
Colours noticably change different shades etc. I think this only happens when watching content through the built in freesat tuner.
I have tried turning off the smart settings etc but it still happens.
Is there a setting I'm missing or is the tv just broken??
(The menus don't flicker it's just the content on the telly at that time)

Any help much appreciated.