Is there something worng with the talks streaming endpoint?

I have an application in development which uses the talks streaming functionality. Something seems to have happened that means the first stream after the peer connection has been established glitches by going blank for several seconds and then finally catching up and playing the video half way through the response.

All subsequent streams work fine. I thought this was an error on our side but we could not work it out and so I went and downloaded the official live streaming example from your github repository and am getting the same outcome.