Ignis transaction not included in the blockchain

Ignis transaction not included in the blockchain

The following transaction submitted to the Ardor blockchain remained unconfirmed and eventually expired, what is the the reason for this?

{
  "senderPublicKey": "...",
  "isBundled": false,
  "chain": 2,
  "signature": "3a49a35627b4ce8a5ac2822b35818f907aec4fd53e79fb02d900d88c0f991c0d71973c434ccaad318a1288a1fb64e53d20dc30de74beb18520c5f4bce06372d4",
  "feeNQT": "100000000",
  "requestProcessingTime": 0,
  "type": 0,
  "fullHash": "552ec333deb265d60ccfa4225123106ce4fc8f9a751185c561083b4cd9b14ed3",
  "version": 1,
  "fxtTransaction": "0",
  "phased": false,
  "ecBlockId": "18397966223991632613",
  "signatureHash": "72caad33596e08e67fe43f42033c0223f9abec9b440b10c07cfd186a037eb972",
  "attachment": {
    "version.OrdinaryPayment": 0
  },
  "senderRS": "...",
  "subtype": 0,
  "amountNQT": "77470950921",
  "sender": "12661870821659068934",
  "recipientRS": "ARDOR-LHJR-WZVF-VKTX-3PVAA",
  "recipient": "1451133144082759191",
  "ecBlockHeight": 384416,
  "deadline": 60,
  "timestamp": 22957813,
  "height": 2147483647
}

https://ift.tt/2Q1gw0X