First, this is not a SketchUp issue.
We believe this is a 3DConnexion SpaceMouse Driver issue. I downloaded a critical Lenovo BIOS update two days ago. Everything working well including SU17 and LO17. Only issue so far revealed is SpaceMouse has stopped working. I worked with 3DConnexion Tech Support yesterday. They are continuing to work on my case.
Thought I would reach out to the community and see if anyone else is having the same problem.
Details: Lenovo T470p, Win 10 Pro, SpaceMouse Driver 10.5.4