@erl829 

Schedules that are set in the smart device are saved internally so even if your network went down it should have still turned off.

If the plug only had one instance of that happening, it might have been something with the time sync? If you are consistently seeing this issue happen on Saturdays, factory reset the plug by holding the side button for 15 seconds and install the plug again. During the install the plug will auto-sync the time again with your plug. Configure the schedules again and see if the plug turns off by creating small test schedules. If so, create your actual schedules and see if that now works.