I do have some Roku devices that I keep powered down (and unable to connect to the internet). For those, I just perform the manual update (Settings/System/Software Update/[Check Now] ) if they have been off for an extended period. (weeks).
The Software Update just makes sure the OS and and installed channels/apps are up-to-date.
I wouldn't fret if my device missed its daily check and just monitor if it continues to do this. (your ISP may have performed an update or reset, or been down without your knowledge during the scheduled "time" that your device was scheduled. Sometimes mine checks during the day, other times in the middle of the night.
I understand what you are saying. How many "missed its daily check scheduled time" would be considered a Roku OS or device issue 1, 2, 3 or more days. My device (sometimes) will also check during the day or in the middle of the night as the case maybe however the Roku OS has been very inconsistent as of late with the automatic scheduled "time" checks. Why is the "Last checked: date and time" that is associated with the Roku OS automatic scheduled time update information no longer being reported. The automatic "Last checked: date and time" / Last updated: date and time" information used to be included with the Roku OS after any update has been automatically performed. The Last checked and/or Last updated information will only refresh the information after the manually check now option has been selected.
