I'm having the same issue here :
screen goes to sleep without an issue
but the screen can't come back from sleep as it's connecting / disconnecting.
Playing with the cable doesn't change anything.
Screen is fine on a Intel build :/
Clean install of Windows 10 Pro on new build :
AMD Ryzen 5 2400 G (GPU drivers : 23.20.827.0 / 17.40.3701-feb12)
Asrock AB350M Pro4 (Chipset drivers : 18.10_feb )
HP DIsplay 27er (drivers 18.104.22.168)
Basically if the screen geos to sleep I only can reset the PC