Yesterday I had a problem with a 4 month old XT1 camera going into rapid repetitive recording of clips until the battery drained. I reset the camera with new batteries and all appears to be fine. Today one of my other XT1 cameras a year old, did the same draining the battery. This was reset by removing the camera via the app and reinstalling it. It now appears to work with the battery showing OK. All the clips recorded seemed to play back at double speed so clearly something is not working properly.
usually i find this behavior when my camera’s batteries begin to fail under load. Unfortunately, the battery indicator is notoriously inaccurate. I tend to get 4-6 months out of my heavy use camera, and the others still have the original batteries.