A problem has developed with my unit which I’ve not found anyone else report on. It worked fine for the first 3 months but now it continuously powers on and off every 1 second or so. In short, the unit is unusable. The problem only occurs when the front camera wire is plugged in. If just the rear camera wire is plugged in it is fine (but obviously there is no recording from the front camera!). I’ve tried restoring factory settings and formatting the SD card, but it seems to be an issue with the unit short-circuiting when the front camera is plugged in. Any ideas gratefully received. The firmware is K1S:R158/2015047. Thanks.