I am an owner of a 3-month old Apple Watch Series 4 Nike Edition. An hour ago, I took a quick dip in a portable pool. So before I went in, i enabled the waterlock mode from the notification I center of the apple watch. I was in that shallow pool for less than 20 minutes and went out. When I was trying to turn the digital crown of my watch, to eject water, it was not responding. The apple watch then restarted, not once but many times. When the watch booted, I tried the digital crown again because it is still in waterlock mode. It wasnt working. I turned the watch off because it was heating up. I called the Apple Customer Care and they instructed me to bring it to an authorized repair center to have it checked. I will have to wait for the result of the check up, but as for me I am not willing to pay any cent. I will demand a free replacement. This is a series 4, it is supposed to work with swimming in the pool. It was just a portable pool. I have been an apple user for years, and was surprised to see the quality of their products deteriorate. Attached is a picture of the portable pool.