I'd started using SpacePilot when it just came out few years ago and recently decided to add SpacePilot Pro to my 3D mouse collector

SpacePilot Pro has more features comparing to Spacepilot; however, the manupulating  of 3D model seems having a problem

Once a while, a fixed point stops me from rotating the model freely  - I have to shut down the SW and reopen again to solve this problem

Secondly, the rotatiing is not smooth as with SpacePilot

Anyone here has experienced this behavior? I believe I downloaded the latest driver from 3DConnextion

Thx, Chris