Areas where rows of grass or straw do not appear

[Shaba84]

Hello, When harvesting this usually happens in some areas of some fields, the same thing happens when it is harvested leaving rows of straw, to which this fault / eror may be due? Thank you

[W1der]

My guess is that the creator of this map forgot to delete the "tip collision" from the original map that was edited ...

This clip explains what it is.
https://www.youtube.com/watch?v=BxbAmuDkSfM