My Vizio p65q9h1 disconnects when I put my hisense 55 u8g in enhanced hdmi mode.
I have a rx6800 xt by gigabyte..
I also have two other 2 other displays which are unaffected by the switch in modes. (Tcl r17 and a regular monitor, maybe Asus )
I'm not much of a poster so if more info is needed let me know.
Also any display changes on the hisense locks up the computer for awhile, like 2 to 3 mins while it processes the change.