Yeah, we're in Fall solar transit period. This explains it in some detail: Sun outage - WikipediaWe have been recording Coronation Street on CH132 for quite some time. For some reason, our 630s are trying to record it at 1300 EST (used to be 7pm. Hockey?) Anyway, the channel is not coming in. Our second 630 records fine but on CH144. I'm not aware of problems at other times of the day. Is it possible this is a solar interference issue?
Normally the outage is only supposed to be a few minutes (wiki says up to 12), and the exact start/end times will vary over the period. Should be over within a week'ish.