GPS stops tracking during hiking/walking

Hello, are you experiencing problems with the incorrect recording of the route while hiking or walking? I didn't have such problems last year. The route is recorded correctly for some time, then it stops tracking. The distance is also not correct - according to the map, it should be around 4 km, the entire route I covered is 11.5 km, but the watch shows 10.3 km. (???) When I rested, I paused the activity. I am attaching my wife's activity, she uses Apple Watch - her route is correct. It can be seen that half of our routes are the same. I'm a bit confused that I have to deal with such problems with a €1000 watch.
Any ideas on what to do in this case?
Thank you for any advice.