Did an open water swim with a dive maximum -4m. Laying on the beach for two hours. Getting back into the water and I pressed the power button. That's it! It started looping over the functions of power button as light > Controls > Assistance. After a while it switched off. I switch it on couple of times but the the power button seemed to be stucked. Until the night was completely off unable to start it at all. Very dissapointing.