I was having trouble with my AVR Key, and they recommended KabelDirect. I had purchased a bunch before and they didn't work with the AVR Key. Fine between PS4Pro and TV, but not fine with AVR Key in the middle: black screen. Even ones with the HDMI Premium certification didn't work.

Cave: Trinnov Altitude CI-8; Oppo 203 Vanity HD; 6xDSP5k, DSP5kC, D1500; Sony Z9D, PS5 Pro; Apple TV 4K
Living: Wiim Pro; Rega Planar 1+; 2xDSP5k
Master: Wiim Pro; 2xDSP3100
Kitchen: Bluesound Flex stereo pair / Amazon Echo Studio
Deck: Wiim Mini; Random Chinese Class D; Cambridge Soundworks Outdoor 52s; Polk Sub;
Garage: Wiim Pro; 2x5k