My system is on static address; that's not it, at least in my case.
It happened today as a matter of a fact.
Paid Pandora asks if I'm still there (press play/pause to resume).

I press play and then it just says loading...
It will stay that way for ever.
I press menu and get into the main menu for the source where I have a selection of service I want to listen to. I select Pandora and after few second buffer music is playing again.

There seems to be some sort of timeout thing going on that then locks up reconnect.