static on Cinema Display with new 2018 Mac mini at Catalina startup

I'm using a 23" Cinema display with my 2018 macmini, connecting it with a dvi-hdmi cable. At startup, the monitor shows static. If I power off the monitor and then back on, the expected startup screen displays for a second, but then returns to static. My only workaround is to unplug the hdmi cable (keeping the computer still powered on) and then plugging it back in, which bring the monitor to normal display.

Does anyone have a solution for this problem? Thank you!