ARRAY_COUNT() returns incorrect result

MutableDocument mutableDocA = new MutableDocument("test2","{\"names\":[null, 'abc','def', null, 'ghi'],\"ID\":\"test2\"}");

database.save(mutableDocA);

Query query = database.createQuery("SELECT ARRAY_IFNULL(names) AS NONNULL, ARRAY_COUNT(names) AS COUNT, ARRAY_LENGTH(names) AS LENGTH FROM _ WHERE META().id = 'test2'");

ResultSet rs = query.execute();

for (Result result : rs) {

    Log.i(TAG, String.format("TEST JSON: %s", result.toJSON()));

}

I/CBM: TEST JSON: {"NONNULL":"abc","COUNT":5,"LENGTH":5}