Can't extract geo keys on a polygon with a nearly-touching hole

I'm trying to load polygon entities from OpenStreetMap into MongoDB, and encountered an error with the following object:

https://www.openstreetmap.org/relation/7397686

While the hole in the large polygon is indeed fully contained in the polygon and does not intersect with it, inserting it with a 2DSphere index still fails. 

If I shift the hole polygon a few meters northwards (putting it a bit further away from the outer polygon), it inserts correctly