3D Mice are redirected partly or could not be redirected at all.
3DCONNECXION does not recommend to use remote solutions like native RDP High-Level redirection or RemoteFX USB redirection with their mice. However at the time of writing this KB article we do not have any acknowledgments that mice must work as expected with RDP protocol. It means that 3D mice could work improperly with RAS or MSTSC.exe
If you are a mouse owner, it's better to contact the vendor of your mouse. Or try to use 3rd party solutions like this. If it works with default MSTSC.exe, it will work with RAS with a high probability.