SS IPTV

I can watch a channel for about 10-15 min, then the screen goes black, the channel disappears for 5-10 seconds, then the channel starts again.. I can then again watch for 10-15 min, screen goes black, channel disappears for 5-10 seconds before starting again.. also I cant find the app at app store,...

This is my problem.. Every 8 minutes my ss iptv frezzes, screen goes black for about 10-15 secunds, then again everything works fine for another 8 minutes! I have good and stabile internet (50 mbits), tv conected with ethernet cable (if i use wifi, its no difference)... What can I do to solve this i...