Wheels popping into motion

[Stem]

R1T - Gen2 - After being parked overnight - and placing it in reverse to back out of the garage, the wheels make a loud popping sound as the begin to turn. This happens in cold and warm weather and only after sitting for an extended period of time - is this something I should be worried about or have checked, or does everyone experience this?

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[MountainBikeDude]

Probably just the parking brake pad "breaking" free from the rear disc. It's normal certain environmental conditions will cause it more than others.