Try using 20.2.x drivers and turn off enhanced sync in Radeon control panel.
If that doesnt fix it, set you refresh rate to 60, disable HDR if enabled en Freesync.
It could be the drivers, but also cables..
Fixed something like this for myself, by switching to HDMI, boot&shutdowns again, and reseating DP-cable at both ends.. turned out one of the pins on the DP cable had some grease (?!) on it.
if unpluging and reconnecting fixes it for you without restarting your machine it most likely the cable...but could also be driver or display related. My guess is the cable though, so please test HDMI maybe a bit longer if your monitor has it.
for the eset error, might be unrelated to black screen or might even be the cause.
please check How to fix Event ID 455 ESENT error in Windows 10 V1903? - Microsoft Community