When generating environment sector items all the items for LODs requested LOD to minimum LOD are generated, such that every lower level of detail is a strict subset of of the higher detail sectors. However the random seed and coordinate system for the lower detail generation still uses the high detail seed/coordinate system, which causes inconsistencies when LODs switch.

This is difficult to fix since fixing it the "correct" way will move existing environment sector items. An alternative might be to generate low level of detail sectors by running generation for the included levels of detail on the max detail sector.