When using Remote Desktop, one of the 2020 era Windows updates caused middle mouse button panning in Civil 3D model space to have an annoying rubber-banding glitchy snapping movement.
Activate Windows Magnifier by pressing the "Windows" key and the "+" key at the same time.
Find the zoom adjustment box by moving the cursor around and change it to "100%".
Everything should look the same as before but now the middle mouse button panning in C3D model space will be smooth and predictable.
Deactivate Windows Magnifier by pressing "Windows" key and "Esc" key at the same time.
... I think the reason for this glitch has something to do with the way the cursor coordinates are handled in c3d when pressing middle mouse button in model space. It does not appear to happen in vanilla AutoCAD or in c3d paper space. Magnifier activates a different cursor tracking system in RDP that more accurately reads the position.
Potential similar problem, shot down by the jokers posting on autodesk forums:
https://forums.autodesk.com/t5/autocad-forum/autocad-on-remote-desktop/td-p/7940335
