$geoWithin in aggregation pipeline after $lookup and $unwind returns incorrect results

Steps to reproduce within mongo shell: db.createCollection("items")   db.createCollection("locations")   db.locations.insert({"coordinates":[25.266, 60.36938],"id":42})   db.items.insert({"id":1, "location_id":42})   db.items.aggregate([{$match:{id: 1}}, {$lookup:{from:"locations",localField:"location_id",foreignField:"id",as:"location"}},{$unwind:"$location"}, {$match:{"location.coordinates":{$geoWithin:{"$geometry":{"type":"MultiPolygon","coordinates":[[[[20.0,70.0],[30.0,70.0],[30.0,50.0],[20.0,50.0],[20.0,70.0]]]]}}}}}]) This returns nothing in MongoDB 3.4.4. The expected result is (as in 3.2.13): { "_id" : ObjectId("594122edb3d185a5e6770c86"), "id" : 1, "location_id" : 42, "location" : { "_id" : ObjectId("594122bdb3d185a5e6770c85"), "coordinates" : [ 25.266, 60.36938 ], "id" : 42 } }