@SmartyPants,

When you were disconnecting the switch to take it out, did you happen to notice if any of the wires had become loose? It's possible that a loose connection could cause a similar behavior, even though I would have expected the power to also be cut.

Do you happen to know if the device received a firmware update at any point during this process?

When you reset the switch, did you use a soft or factory reset? If it was only a soft reset, it would explain why a reset did not solve the behavior.

  @SmartyPants,

It's possible; however, I have never seen it before - and I imagine that your jiggling is lighter than what happens naturally during shipping and transit.

I believe that the switching sound you are hearing is the physical connection inside the switch being toggled. Separating the switch functionality from the physical operation is what allows for smart functionality, and I believe the noise that you are hearing can vary between devices.
 

Did you happen to make any changes to the rest of the lights, such as changing how much power the switch needed to deliver? Either way I would recommend keeping an eye on the light, to see if the behavior returns - if it does, you may consider getting in direct contact with our support team.