It seems that the PCG system is applying weightmap values to the points incorrectly.
Perhaps the weightmap is being cached from the landscape incorrectly,
or the weightmap is being read incorrectly by the PCG system from the cache.
The further from zero the Y axis value, the more offset the X axis value appears to be:
Hello,
i have the same problem. I am trying to exclude landscape layers from spawning meshes on it, but keep getting incorrect results like in your pictures. This need to be fixed!