I have and I see nothing... I've taken plenty of skids in and out and have half disassembled a dozen of em, and fully disassembled 4 of them (every nut and bolt out to clean and paint stuff) I don't see anything wrong and don't know what made it stop doing it.
I bet the track was sitting up on the drive sprockets, not down over the internal lugs of the track. Then when you drove it, it slipped into place. Just a thought.