Recently upgraded to Big Sur from Catalina, and mostly everything works! Have an Asrock x570 Taichi MB, Ryzen 3900X, Sapphire Pulse RX580 with OC 0.6.5. My main monitor (lenovo 4K) when connected via DP works fine when booting in verbose mode, but as soon as the OS is loaded the monitor goes black and says no signal. The hdmi ports work fine. Any thoughts on what the issue might be?