What can make a building appear on some layers but not on others?

Here is the case that baffles me: ID Q4666960, i.e. the “Aberdeen Pavilion” at 1000 Exhibition Way, Ottawa, Ontario, Canada. (45.40007/-75.68272)

This building’s outline does not appear on the Standard layer at any zoom level but it does appear on the other three layers (Cycle, Transport and Humanitarian). Its name appears on the Standard layer (giving the impression that it’s the name of the plaza) but only at the highest zoom level.

What could be causing this?

It may be a bug due to this area covering it: