Mouse sticking while streaming older game

UT2004 recently got an update to run on modern OSes. It runs fine on my regular laptop but when I attempt to stream from my server with Apollo/Moonlight the mouse will stop moving as if I'm hitting a wall. I can't 360 turn, I have to spin back around the other way. I've been using this system for years and this is the first time I've run into anything like this, every other game works perfectly. Any advice?