I'm currently recording from two satellite signals (BBC4 and BBC2HD) and wanted to watch something ("Via IP ... not satellite") on the ITV Player but I'm confronted with the message "Cannot change channel while recording".
But I wasn't trying to change channel, I was trying to watch the ITV Player (which requires no satellite signal and therefore does not need a channel change). It would happily let me open 4OD and iPlayer without complaining about a channel change, but not ITV Player.
Bizarrely, despite recording BBC2 and BBC4, it was quite happy to let me switch to BBC1 and it showed me the feed from that channel. It wouldn't let me view any other channels, but three were arriving somehow.
Have I entered the twilight zone?
Here's how my TV guide looked (while I could view BBC1 despite recording BBC2 and BBC4). The TV guide was restricted to all of the BBC1 regional variations. I really did enter the twilight zone.