Hi I've had my galaxy watch now for over a year and it has worked fine. However, just suddenly the heartbeat monitor, step count and wake up gesture have stopped working. I have tried resetting the watch but it is still the same. It seemed to occur when I was in the middle of a walking exercise using Samsung health. If I run a heartbeat check it says that the heart beat cannot be detected.I have checked and my do not disturb , night mode and theatre mode are all off. Any help would be appreciated.