Microsoft Stream page get "hung" several times when testing small size single video file

hi, Microsoft team I would like to know whether Stream is already in LIVE production or is still in pilot stage.  I have created one channel and uploaded a small size video file for testing.  It seemed that the stream page works for a while but it will get "hung" after a while.  The whole Stream page seemed to get  freezed and no action to any button click.

Appreciate if anyone could provide advise.  Many thanks.