I've had some much bigger "strange happenings" lately. Radio cutting off and on randomly, and just recently my electrics were ape shit when I unlocked my car and had a constant static sound coming from the speakers for several minutes.
After discussing it with my service advisor, he told me it was a result of cold weather. On that day here, temps dipped into the low 20s. He said the computers had a hard time dealing with the cold, so strange things were bound to happen. While its not "normal", its not uncommon, hard to replicate enough to require repair, and to just ignore it.