99% chance it was a physical blockage or something like that since there's nothing in the programming/hardware that would cause that. Either a piece of errant glue/plastic breaking off internally or something worming it's way underneath the controller.
Don't worry about it further if it fixed itself. If it gets stuck again, either take it to the dealer and have them fix it or see if there's an easy way to get a view underneath the controller in the console.
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