Strange and annoying things:

On KD-55XD8577 (with HDR and HLG), HDR movies on Netflix and HDR transmission on Eurosport 4K, displays dark pictures and distorted colours, with yellow and grey tint, no matter the advanced settings I made.   On KD-55XD7005 (HDR, but no HLG), which is half price than KD-55XD8577, the colours are vivid and  the picture is bright on the same movies and transmission.

Any explanations?

I am very dissapointed and frustrated with my KD-55XD8577.