Gps fix very erratic

[Davidwedel]

Look at the N and E numbers. You’re 9000km from field origin. This causes issues.
Delete the field and make a new one.
Discussion about the issue…

Field boundary not rectangular

As Davidwedel and Larsvest described the problem occurs when you start to create the field in SIM Mode and then go to the field. So just enter your coords in SIM (maybe thats not even neccesary) and start creating the field when you are near the field. Then it works as it should.