Denon and Marantz receivers built since May are free of the HDMI 2.1 bug | What Hi-Fi?
HDMI ADAPTER KIT TO SOLVE 4K/120Hz & 8K/60Hz INCOMPATIBILITY ISSUE
Report: latest AVRs from Sony, Denon / Marantz, Yamaha, etc. have a bug in the HDMI 2.1 chip - unable to pass through the 4k120hz HDR10 signal (german article) : r/xboxone
Best A/V Receivers with HDMI 2.1 and 8K Support - GameRevolution
Denon and Marantz to ship out free 'adapter' to fix AV receiver HDMI 2.1 bug | Home Cinema Choice