Broadway bridge closed for repairs

via StreetComplete 19.1

Attached photo(s):
https://westnordost.de/p/13110.jpg

The feature marked "White Pond" should actually be split into two, with the boundary on this narrow neck. The large pond to the east of this marker is correctly "White Pond", and the smaller pond to the west is "Blue Pond".

I tried to split the multipolygon in ID, but I wasn't able to figure out how!