I have a bizarre issue. First of all, here is my setup:
PC: Custom-built with Intel i7 8700K, Nvidia GTX 1080 Ti, and Windows 10
TV: Samsung Q90T 65" 4K TV
Receiver: Sony STR-DN1080
Speakers: The entire Sony Core Series
Connections: The 1080 Ti is connected over HDMI to HDMI 4 on the TV and the...