Apple TV 4K problem with Dolby Vision

Best Apple users and developers,

Do you recognise this problem? In a dark room looks Dolby Vision on the Apple TV 4K like a mat/bright filter. I have a LG CX and all the Dolby Vision content that I played on the Apple TV 4K gives the OLED a grey filter instead that black is black.

Is this a bug in tvOS 14.3 (and earlier?) or is it a Dolby Vision problem in tvOS because the same content with Dolby Vision that I played on the X-Box one X or the native app on LG looks how Dolby Vision must be. Or is it a hardware failure in my Apple TV?

Hope the developers or any one have the answer.

These 2 photo's I took in my living room in the dark.

(Picture above is the Apple TV 4K and the picture in the bottom is the native app on the LG)

Both from the Disney+ app.