I don't use VW as much anymore, so I'm not sure when this started happening.
But when I move an object, or make a parameter change, the change does not show on VW unless I pan around or zoom in/out. It's really frustrating and makes it hard to work. Same thing with changing views, if I go from 3D to Top/Plan, or do "shift+c" to go into orbit, the view doesn't change until I move around. VW never used to function this way.
I've already tried doing a clean install and the issue still persists.
*EDIT: I'm running VW 2019 SP6 on macOS Big Sur 11.2.3....however I know this has been happening before SP6 and before I went to Big Sur.