Hi,

what is the meaning of all these overlapping areas of grassland, wood and forest? QA such as OSM Inspector give many red flags. Both the wood and the forest have you as last mapper logged so I assume you are aware.

As for this object, 

https://www.openstreetmap.org/relation/2569586

Grassland, highlighted in orange, which shares a border with the wood is not inner, rather to be treated as outer and excluded from the wood outline i.e. you have to cut the wood outline going around the grassland.

cheers