Hi Carl,
I've done some more testing, and it is not a 100% consistent, but it happens fairly often for me.
I made a quick test.fla and looping worked perfectly, I have not supplied it since it doesn't reflect the problem. And my project is much to convoluted to be used as a sample.
I therefore went deeper into the my project to try and figure it out. The feature/bug seems to happen when _renderHandler in VideoLoader takes too long to finish. I've simplified my project, but for some reason or another, every so often _renderHandler takes too long which results in a VIDEO_COMPLETE event to be dispatched. It seems like the _statusHandler receives a "NetStream.Play.Stop"-event, and the VIDEO_COMPLETE event is being dispatched because the video is not paused.
I've tried publishing to FP10 and FP10.2.
I will continue to test, and if I come up with something more insightful I will post it here.