Weird, it sure doesn’t for me 
It was when i flashed the image and tested with the computer monitor. It’s now in a powerstrip.
The voltage is 224V RMS.
It’s connected to ethernet.
I’ll look at this sometime in the weekend. I’ve been ordered to leave “good enough” alone for now 
For the record:
It’s now connected with the HDMI-cable i previously used for my pi. It’s outputting 4k bt.2020 video now.
The video ought to be 10 bit, but the AVR claims to get 8 bit. The TV does recognize it as HDR.
It works directly in the TV and through the amplifier.
I’ve applied the cache settings mentioned here: