RFM95W Device Migrating to V3

I have an RFM95W based custom device which transmits a message is switched off and switched on again every 1 hour. I have migrated the device on The Things Stack from V2 using the guides provided.

The first message was successfully transmitted to The Things Stack but then further messages are not shown on the device page (they seem to be ignored). They are however shown on the gateway page on The Things Stack. Below is an example of a message sent from the device as shown on the gateway data on the things Stack.

{
  "name": "gs.up.receive",
  "time": "2021-07-21T04:58:43.862668425Z",
  "identifiers": [
    {
      "gateway_ids": {
        "gateway_id": "eui-ac1f09fffe015db9"
      }
    },
    {
      "gateway_ids": {
        "gateway_id": "eui-ac1f09fffe015db9",
        "eui": "AC1F09FFFE015DB9"
      }
    }
  ],
  "data": {
    "@type": "type.googleapis.com/ttn.lorawan.v3.UplinkMessage",
    "raw_payload": "QBYbASaAAAABfn/3erCnRpGCpdKEYMTgF5NfAw4sKBOT29g1uSrChXEyNMi4g9Vma59Xz+Fgi8HSjdb0",
    "payload": {
      "m_hdr": {
        "m_type": "UNCONFIRMED_UP"
      },
      "mic": "0o3W9A==",
      "mac_payload": {
        "f_hdr": {
          "dev_addr": "26011B16",
          "f_ctrl": {
            "adr": true
          }
        },
        "f_port": 1,
        "frm_payload": "fn/3erCnRpGCpdKEYMTgF5NfAw4sKBOT29g1uSrChXEyNMi4g9Vma59Xz+Fgi8E="
      }
    },
    "settings": {
      "data_rate": {
        "lora": {
          "bandwidth": 125000,
          "spreading_factor": 7
        }
      },
      "coding_rate": "4/5",
      "frequency": "868100000",
      "timestamp": 2334592891
    },
    "rx_metadata": [
      {
        "gateway_ids": {
          "gateway_id": "eui-ac1f09fffe015db9",
          "eui": "AC1F09FFFE015DB9"
        },
        "timestamp": 2334592891,
        "rssi": -28,
        "channel_rssi": -28,
        "snr": 9.5,
        "uplink_token": "CiIKIAoUZXVpLWFjMWYwOWZmZmUwMTVkYjkSCKwfCf/+AV25EPuenNkIGgwIg9PehwYQ+/GgmwMg+PDRhPmZDg=="
      }
    ],
    "received_at": "2021-07-21T04:58:43.862468347Z",
    "correlation_ids": [
      "gs:conn:01FB1VBCGWWHV2MHE77A6SR5X9",
      "gs:uplink:01FB3PWARPNK3H4J26H3ZZ0QD3"
    ]
  },
  "correlation_ids": [
    "gs:conn:01FB1VBCGWWHV2MHE77A6SR5X9",
    "gs:uplink:01FB3PWARPNK3H4J26H3ZZ0QD3"
  ],
  "origin": "ip-10-100-12-248.eu-west-1.compute.internal",
  "context": {
    "tenant-id": "CgN0dG4="
  },
  "visibility": {
    "rights": [
      "RIGHT_GATEWAY_TRAFFIC_READ",
      "RIGHT_GATEWAY_TRAFFIC_READ"
    ]
  },
  "unique_id": "01FB3PWARPPGDC435Q8BEEW98B"
}

imho the messages of your node are ignored. It’s caused by not increasing the Fcnt-value. There are a few threads in this forum discussing this problem.

How can this be solved?

This is your answer in the first instance - please search the forum for the many discussions.

Please format your posts as per guidelines - logs & blocks of code need the application of the </> tool.