Map tracking issue

Hi, I have problems with incorrect recording of the route while hiking. I didn't have such problems last year. The route is recorded correctly for some time, then it stops tracking (accoroding to the map). 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. Other data is correct - elevation gain, elapsed time, etc. Just the map & distance.  
I'm a lil bit confused that I have to deal with such problems with a €1000 watch.

Any ideas what to do in this case?