text: > Maybe this is an issue with the web editor,
  Ah - I'd imagine that the iD editor would struggle here.  It's pretty clear what how things are linked in the other web editor Potlatch 2, and JOSM ought to be able to visualise it OK.
  There are actually more than 2 multipolygon relations - https://www.openstreetmap.org/relation/6701391 is the main one, but there is also https://www.openstreetmap.org/relation/9931898, https://www.openstreetmap.org/relation/9931900, https://www.openstreetmap.org/relation/9931899 at least.  I'm normally quite critical over this sort of "write-only mapping" but in this case representing a 3d object on a 2d screen is always going to be a challenge.  One criticism might be that "level" isn't used more, which would enable https://wiki.openstreetmap.org/wiki/OpenLevelUp to visualise it as well.
  Regards,
  Andy
  