To move around the model(s) I use the middle mouse button (MB3) to pan the camera. This is particularly useful when manually applying support.
Very frequently pressing the middle mouse button causes the viewport to go blank, and you have to hit the 'home' button to move back, and away, to the iso view. Super disruptive to workflow as you have to constantly go back to where you are working.
This is single biggest thing that prevents me from upgrading to PRO level as I have no reason to suspect that this does not happen with that version.
I have tried using backward compatibility mode.
I was hoping 1.9.5 fixed this, but no difference. I am surprised there are not more people reporting this.