We just had a local station switch transmitters from a primary station on channel 9.1 to a secondary station on 13.4. Programs scheduled to record on the station failed as soon as the switch occurred, and attempting to edit the timers failed with a generic “Weak Signal” message. Doing a new channel scan found the new channel assignments, and immediately allowed tuning of the new channel, but the guide data did not update immediately even after doing a manual guide update, nor did the timer fire.
The next day, everything is working as per normal; the timers returned and show the new channel number, and the guide is working correctly.
It might be a good idea to document the process the user is expected to follow in this case, and the apparent need to wait until overnight housekeeping has completed before expecting timers to operate again. It’s actually quite helpful that the timers seamlessly migrate to where the channel is, but I can see it potentially frustrating during the transition.