Looking for help please. My P4 flipped into a lake on it's first water takeoff using the Water Strider'. (See link below). Has anyone seen this before ? Strider was correctly assembled and attached, bird was in P mode, vps off, fps on, and radio has an Itelite extender. Manufacturer can't explain it, so I'm still trying to figure it out. Good news is after a dry out the bird still flys, although the battery didn't make it. All ideas welcome please.