Garmin Forerunner 955 - Problem with navigating the gpx route

Hi, I have a problem with the track tracking function on my Garmin Forerunner 955.
After uploading a GPX route, the watch loses the trail, moving the indicator several hundred meters. Even if it catches the route, after a while it moves the indicator off the route visible on the map. I tried changing the GPS settings from default to maximum satellite accuracy, but that didn't help either.

I should add that my partner has the same watch model. We uploaded the same GPX route, and her trail tracking works fine. My old Fenix 5 watch doesn't have this problem either. In the attachment, I am sending you what the beginning of the same route looks like on my watch and my partner's watch.

Has anyone had a similar problem and knows how to solve it?