SkyEye first autonomous flight

1.65 mile flight, most of it out of sight. Terrain following max 60m altitude

4 minute video

Followed route perfectly except for about 45 seconds approaching and after church when it turned left too soon and tried to correct, then repeated this about 3 times.

Any ideas why? There was no wind.

https://youtu.be/x2Gx43SSfow

[infoplane][/infoplane]