Most likely a bad connection will generate heat. The "pause" was enough to cool off the bad connection now cooler. So that thermal adjustment is enough to allow at least a marginal connection to perform again. check wires and connections to switches by hand.
be careful not to burn fingers. A hand held Digital Infaraed Thermometer (I just bought new one for $15.) may help you track the electrical hot spot. It may help with other kinds of troubleshooting.
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