If the unit is in standby overnight, it will boot up and run housekeeping tasks at 03:00. Amongst other things, the housekeeping boot should handle any channel changes. My foxsat HDR dealt with the changes at the start of the month without a problem.
Perhaps your unit didn’t get chance to run a housekeeping boot.
All hard disks will fail if used enough – the motors and other mechanical parts will just wear out. It is likely that disks in Foxsat have the same failure rate as any disk with similar usage.