From what I heard it was during testing and nobody was on it, that's the only reason I can think that more info wasn't released:
“It got shut down after a computer/board failed allowing two log flumes to be dispatched at one time, allowing one to hook on the back of another. Park had to close it down for the season & let the state know within 24 hours"
Log behind nearly pushed the front one over the edge at top of lift