WHY DOES UNPLUGGING AND PLUGGING BACK IN OFTEN RESOLVE ISSUES?

You probably try this technique first when a device isn’t operating right. It works because many devices have internal computers that run firmware, and sometimes it has bugs that lead to error states, memory leaks, or crashes. Unplugging, waiting 30 seconds, and then plugging them back in forces the computers to restart, which clears out the device’s memory and makes it reload and re-execute the firmware from a known good state.