Hi there,
I have the following setup here:
* PC with Radeon 7900 XT (also happened on the old rig with GTX 1060)
* 4K monitor connected via DP (also happend with the old 1080p monitor)
* 4K Smart TV (Sony) connected as 2nd screen via HDMI on an AV receiver
The HDMI "path" is: PC -> AV...