I am having the same problem since I upgraded to Windows 10 Home 1903. I have am running an Dell XPS 15 9570 with a DisplayLink plugable USB 3.0 Docking Station. The workaround I am using is to disable one of the Display Adapters after I start up the computer and before I start ArcGIS Pro. Then I re-enable it after shutting down ArcGIS Pro. Otherwise my dual screen setup works weird after I restart the computer.
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