HDR / Emby ambilight error

i’ve using HUE Essentials Premium on my Shield to control my Hue Play Gradient.
This works fine on apps like Youtube.
If i play Videos on the Embyapp the ambilight works too.
But if i play HDR(HDR10) Content the experience is realy disappointing.
It work, but dont correct. Seams like not the whole picture are scaned or anything like that.

Can this be fixed? Do you need further Information from me to fix that?
Would be awesome, because almost every new content is with HDR enabled.