with peak3d’s amltiming patch which is merged in LE master I don't have the issue with iptv live channels.
Krypton amltiming by peak3d · Pull Request #2 · peak3d/xbmc · GitHub
but the issue with not smooth video 1080p 24Hz h264 with real high bitrate 30-40 Mbit/c still exists. For example Avatar can't play in smooth way unfortiunately