Just read up on the TV and it says from philips.co.uk web site 12/05/ 2016 you need a software (firmware update) for hdmi to work properly and sd upscaling is bad (from user reviews on that philips web site) ... they appear to be seeing same issues.
..... so hate to say this but you probably need a firmware update and crossed fingers
This is from the philips web site so not a biased view!