Yes, it is a very recurrent problem, it can be related to the Internet connection or to the server used to watch the iptv channels, but it has no relation with the TV model or the country.
Thank you for your reply. Yes, many users reported that issue. By the way I tested a dozen of lists from providers on the same network with vlc or box and they worked well but not on siptv excepted rarely for some channels. Iptv providers declared that theirs lists worked fine on a net speed connection less than mine (12Mbs). So I could not find any reason for that slowing/blocking other than filtering from net provider or through the iptv.eu server. Regards