When I have 2 monitors connected to my Radeon RX 550, the DVI-connected monitor seems to always be recognized first at startup, even though I have my HDMI-connected monitor identified as the Main display.
This is problematic in 2 ways...first, all main taskbar items are moved to the DVI-connected monitor and all new windows are initially opened on the DVI-connected monitor. This is when the Display Properties panel clearly states that my HDMI-connected monitor is the main display.