I think I saw the slow motion effect you mention. That replay had very choppy motion and I had a Load Timeout pop-up message appear. I also checked my CPU and Memory Usage and both of them were way, way, higher than normal. CPU jumped from 1% tp 25%, and memory usage jumped to 4X normal.
Without playing the replay, CPU and memory were normal on the tee using camera 1 but when I merely selected camera 2 the CPU and memory jumped. Really strange. Bug report submitted with the replay URL.