Rhino 6 Temp ortho - Laggy Cursor

Has anyone come across an issue, when you use temp ortho (shift) the cursor becomes extremely slow and laggy and takes around 30 seconds to become normal and know a solution? Or when using the line tool and after 3 clicks the cursor becomes slow/laggy and stutters and moves on it own for a few seconds.

Hello - if you have VRay for Rhino running, please try disabling that plug-in then close and restart Rhino - does that let it behave as you expect?