You might need to give a little more info, start off with your download/upload speeds: http://www.speedtest.net/result/6650126879.png
Hell, it could just be your IPTV provider and nothing on your end is wrong.
Are you saying that the same source does this or is it from two different sources?
Need more info. Who's your ISP? Did you look at this?
https://www.reddit.com/r/IPTV/comments/722ran/comcast_throttling_or_disrupting_stream
Chances are your ISP is throttling you. I would try with a VPN