That's interesting. I've got a Roku 2 XS that says it was updated May 31st, but it's only very recently that I started seeing the "feature" that turns off a stream if I haven't touched the remote in a while.
I saw it for the first time today, but over the last week or it has not been streaming when I wake up - I usually just leave it on all night at low volume. I'm glad I can turn that off, but such a new feature didn't require a system update?
I realize there may be a couple of other reasons it may stop streaming like issues with a channels servers or spontaneous reboots which I've been experiencing more recently.
Some channels are more likely to cause reboots than others. I suspect they're using features that aren't supported on the 2 XS. Is that the case?