With the smart iptv app I get "stream error" and after 3 attempts "Cannot connect" on some channels more often then on others. If I change channel and then goes back I often get connection after a few times. When its gets connected to a channel it continues to work without any problems.
I have a fast wired connection 250 Mb/s and a new Asus AC68 Router.
I have tried different m3u list and tried to to change buffer size but nothing seems to work.
When I on the same network with the same router stream iptv with VLC on my PC everything works perfect.
Do you have any Ideas what it could be?
I was struggling with the same issue and have given up months ago. I couldnt have found ipv6 setting on my tv under General-Network-Expert Settings menu so, I deactivated it on my router. Now any IPTV app seems working just fine