GeometryAttributeImpl cannot be cast to com.vividsolutions.jts.geom.Geometry

[carrbrpoa]

Hello,

I tried a GET for GetFeature in a layer published from MongoDB store and got the following error:

<ows:ExceptionReport version="2.0.0" xsi:schemaLocation="http://www.opengis.net/ows/1.1 http://mylocalgeoserver:8080/geoserver/schemas/ows/1.1.0/owsAll.xsd">
<ows:Exception exceptionCode="NoApplicableCode">
<ows:ExceptionText>java.lang.ClassCastException: org.geotools.feature.GeometryAttributeImpl cannot be cast to com.vividsolutions.jts.geom.Geometry org.geotools.feature.GeometryAttributeImpl cannot be cast to com.vividsolutions.jts.geom.Geometry</ows:ExceptionText>
</ows:Exception>
</ows:ExceptionReport>

It even happens if I try Layer Preview in GeoServer, asking for GeoJSON.

Here's my mapping:

[{
		"typeName": "occurrence",
		"collection": "occurrences",
		"idAsAttribute": true,
		"geometry": {
			"name": "location",
			"crs": "EPSG:4326",
			"path": "location"
		},
		"displayGeometry": true,
		"attributes": [{
				"name": "type",
				"path": "type"
			}, {
				"name": "description",
				"path": "description"
			}, {
				"name": "status",
				"path": "status"
			}
		]
	}
]

and an item sample:

{
	type: "Some type",
	location: {
		type: "Point",
		coordinates: [-51.216039, -30.047548]
	},
	description: "Some description"
}

If I ask Layer Preview with format GML 2.0, it seems to work:

<wfs:FeatureCollection xmlns="http://www.opengis.net/wfs" xmlns:wfs="http://www.opengis.net/wfs" xmlns:gml="http://www.opengis.net/gml" xmlns:mongo="mongo" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/wfs http://mylocalgeoserver:8080/geoserver/schemas/wfs/1.0.0/WFS-basic.xsd mongo http://mylocalgeoserver:8080/geoserver/mongo/wfs?service=WFS&version=1.0.0&request=DescribeFeatureType&typeName=mongo%3Aoccurrence">
<gml:boundedBy>
<gml:null>unknown</gml:null>
</gml:boundedBy>
<gml:featureMember>
<mongo:occurrence fid="fid--641acbe7_1593bdeffad_-7b2c">
<mongo:location>
GeometryAttributeImpl:location<location crs=GEOGCS["WGS 84", DATUM["World Geodetic System 1984", SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Geodetic longitude", EAST], AXIS["Geodetic latitude", NORTH], AUTHORITY["EPSG","4326"]]>=POINT (-51.216039 -30.047548)
</mongo:location>
<mongo:type>Some type</mongo:type>
<mongo:description>
Some description
</mongo:description>
</mongo:occurrence>
</gml:featureMember>
</wfs:FeatureCollection>

My GeoServer is version 2.7.2.

Any ideas?

Thanks in advance!