Remotely controlling the Minecraft client results in erratic mouse movement. (Spinning erratically while looking directly up.) This can easily be duplicated by testing with RDC.

I use Kavoom to control a second account running on a second machine, giving me seamless use of a single mouse and keyboard between two computers. This has worked flawlessly through version 1.12.2. However, now I am now unable to control movement in the snapshot versions on the second machine. The mouse works normally in menus, but not when controlling the character.