I’ve been having similar problems with Pointless. Some nights it’s on BBC One and then it might switch to BBC Two or be missing completely. Even having a separate series schedule set up for both eventualities doesn’t always record every programme. I was caught out last week when GB News’ “Breakfast with Stephen & Anne” unexpectedly became “The Queen Dies” and all following programmes had the same title, so a series link would create dozens of timers.
Still, considering the circumstances, it’s a tiny inconvenience in comparison.