My Apple Watch SE gives very inaccurate gps readings on this particular stadium

When I’m running at this particular stadium, for some reason the recorded trajectory is very inaccurate but in a very consistent way. It always sticks to this bigger shape. This problem persists between different runs.

Because of that, the watch records 500 meters for each 400 m lap. Moreover, the recorded pace is also 1.25 times higher than it should be. This is a big problem, because I’m used to relying on my pace for tracking the run intensity.

I looked up other people runs on Strava, and they seem to be right on track. For some reason, only my Apple Watch is having this problem.

I record runs with the built-in workout app, and my watch has the latest update.

Really hoping to find a solution to this issue.