Using Windows 10 7.1.0 and AMD RX590 8GB card. Same problem here.

I have same issue since 7 came out. Updates no resolving problem. My Rig I9-9820X, 32GB RAM, M.2 Samsung EVO 970 PLUS SSD, Input cards Blackmagic SDI DUO 2 Blackmagic Intensity 4K Tested with Nvidia GTX 1070, GTX 1080, AMD RX590 Tested with diferent drivers. Same result. Strange, that nobody talkin...