I cant expect programmers to remember the order in all places in the code especially in large code base.

db.eventstatus.insert(
{
"_id": ObjectId("4d2093d0aaed39b6d9716b1d"),
"t12_status": [

{ "status": "coming", "invite": ObjectId("4d208cdb50e82e8f65000002"), "value": 1 }

]
});

db.eventstatus.insert({
"_id": ObjectId("4d208dac50e82e8f6500000b"),
"t12_status": [

{ "invite": ObjectId("4d208cdb50e82e8f65000002"), "status": "coming", "value": 1 }

]
});

db.eventstatus.find({"t12_status":{"status":"coming","invite":ObjectId("4d208cdb50e82e8f65000002"),"value":1}});
db.eventstatus.find({"t12_status":{"invite":ObjectId("4d208cdb50e82e8f65000002"),"status":"coming","value":1}});

//expected: both queries will return the 2 documents. - wanted
//actual@v1.6.5: each query returns a different object, one object. - not wanted, unexpected