I'm not sure what you mean but I'm not watching IPTV through the inner portal. I'm having a provider using Stalker (not sure which version).
I've meant exactly the thing that you said. And could you tell me a version of your firmware? You can check it by System Settings -> Device info. About Stalker version, if you're using Classic skin, then you should have written it in right down corner. If your provider uses Stalker 5.3 or below you can change skin to Smart Launcher and check whether there this issue exists. The problem is that I'm not sure if you're able to go back to Stalker Classic.