Wierd problem with TV on 1.2.3

MediaPortal Version: 1.2.2

Description
(Had to select 1.2.2 in the Version box as 1.2.3 isn't an option yet).
I was watching BBC One fine and then went to tune to ITV1 and after a while it said it was unavailable, so I tried a few other channels including Ch4 and that was the same. BBC One still worked. This would have been roughly around 18:50.
I closed MP and noticed the Network icon in the systray was showing a problem, and checking my router it also showed no connection to that PC. I use the Loopback Adapter though, so I'm not sure why that should affect TV, and only some channels at that.
Anyway, with no network connection I couldn't even VNC or RDP in to the box, so had to do a hard reset, after which it seems to be working normally. Hopefully there's a way to prevent this happening in future, as I don't want my brother (who I'm building this HTPC for) to have to be rebooting to get TV working.

Steps to Reproduce:
Watch BBC One.
Tune to a different channel.

Yeah, I'll disable that to avoid complicating things