I live in New England, and explore the bays, flooded mines and flooded caves of the northeast.Where are you located
I have the same issue--put the FiFish V6 in the water, unlock it and it goes berserk. Has happened since brand new, and is only about 3 months old. Am using an iPhone app with it, and kept up with the latest firmware, app updates, etc. I'll contact QYSEA about the thrusters, thank you for this info!