Clock is late

Hello,

I've had my watch for about 1 year and since then I've had a constant issue with its clock accuracy. Even if I synchronize the time with the connect app manually, the watch is about 10 seconds late compared to the time on the phone. It doesn't matter about software version I'm using, I have experienced this on every release.
Have you experienced this? And what could be the reason for ?

BR:

Z