Mentioned this in a review before a couple of buzz app updates......

If a channel freezes, I find it comes back in only after you go to the channel list/epg. I experience this on multiple iptv services and interestingly the 'stream not available' popup is no where to be seen. This could mean the stream is still active even if froze but the buzz app is not allowing the video/audio/stream to kick back in.

It needs addressing guys.