$geoNear does not always match coordinate given to 'near' when maxDistance is set to 0

See the linked script in HELP-20040. Essentially, when performing an aggregation using a $geoNear stage of the form:

{

$geoNear: {

near: { type: "Point", coordinates: <coordinate> },

maxDistance: 0,

spherical: true

}

where 'coordinate' is a lat-long coordinate that exists in some document in the collection being aggregated, the $geoNear stage will not always match the given coordinate.