I have snipped this excessive image to illustrate the problem.... When I simply mouse over the model, all these edges show the orange selectable mode which persists after the mouse has passed. The only way to clear the issue is to zoom in or out which I presume forces a graphics refresh.

Can anybody please help me resolve this as it is becoming tiresome?

I'm running SW2019 Professional SP 0.0 on an HP Z230 Workstation using an NVIDIA Quadro K2200 with the officially supported device driver Version 411.63