Hello.

Are you sure that "building=yes" should be added on those shelters?
https://www.openstreetmap.org/way/1364609163
https://www.openstreetmap.org/way/1364609164

For ordinary "plastic" shelters, only amenity=shelter + shelter=public_transport are used.

We sometimes use "building=yes" but only for a limited number of shelters made of bricks.  And if they are considered buildings, they will show up in a different colour on the GRB map, which does not seem to be the case here.

I see you still use the iD editor.  Perhaps you just clicked on one of their (bad) presets and did not look at the tags.  Would you mind having a second look?

Happy mapping.