I have also noticed this problem with some viewers and fellow streamers.
I believe the problem is with loading the advertisements that appear before the stream, it seems the advertisement video doesn't load causing the Livestream player to not continue onto the stream.
If using a add-on that blocks the advertisements the Livestream player loads the stream normally.
Although it does appear the advertisement not loading is the cause of the Livestream player from loading the stream, I'm not sure whats causing the advertisements not to load.
I hope this problem can be solved soon.