Watch unresponsible but working on the PC without any problems

The Watch stopped working in the swim session, the counting ended suddenly. I restarted the watch but it failed to continue with the counting only the time shows at the webb. Tried once more to restart the watch but now it's offline when looking at it, but connected to a usb on the computer it looks fine at the webbpage. Can't access the display and the sensor at the back its not working at all. Have tried all available reset functions in the manual and in the forum. I'm i the only one with a stuck watch?