filtered multipolygon area is still displayed

[Cobra]

How to reproduce:

• create a new multipolygon
  
• tag the outer way, i.e. landuse=forest
  
• try to disable the multipolygon by filtering, i.e. "landuse:"

Only the outer way will be rendered in dark grey (as expected), but the area will still be rendered as if there was no filter.

Filtering works fine with multipolygons which have the filtered tag at the relation instead of the way(s).

[bastiK]

I think this has changed and the result is similar to what is described in #6160.

[bastiK]

Closed as duplicate of #6160.