Mongo lookup querying is failed from a collection consists of ~12 lak records

I tried the facet as follows:

db.Alerts.aggregate([
  {
    "$match": {
      "status": { "$ne": -1 },
      "type": 4
    }
  },    
  {
    "$sort": {
      "status": 1,
      "createdAt": -1
    }
  },
  {
    $facet: {
      result: [
        { $skip: 0 },
        { $limit: 10 },
        {
          "$lookup": {
           "localField": "alertTypeId",
           "from": "AlertTypes",
           "foreignField": "_id",
           "as": "alertTypeRel"
          }
        },
        {
          "$project": {
            "title": 1,
            "type": 1,
            "alertTypeId": 1,
            "alertTypeRel.alertTypeName": 1,
            "priority": 1,
            "message": 1,
            "status": 1,
            "startDate": 1,
            "createdAt": 1,
            "createdBy": 1,
            "validUntil": 1,
            "errorFlag": 1,
            "extApiId": 1,
            "errorMessage": 1,
            "autoPublish": 1,
            "statusChangedBy": 1
          }
        }
      ],
      count: [{ $count: "total" }]
    }
  } 
], 
{
  "collation": {
    "locale": "en",
    "strength": 2
  },
  "allowDiskUse": true,
  "cursor": {}
})
.pretty();