mouse movement stopped working

I just acquired the waypoint in the Halani Caverns and immediately went back to the Ardura caravan and discovered mouse movement has stopped working. If I switch to keyboard, movement is fine. I take the waypoint back to Halani Caverns and mouse movement works again. All movement had previously worked until I came back to the caravan from Halani Caverns. I checked a character in standard and there is no movement issue there.

EDIT: This is only happening in the caravan. Once I use a waypoint to anywhere else, I can switch back to mouse & keyboard and mouse movement works correctly.