Chirpstack ignores retransmission of lora 1.0.2

Hi,
Chirpstack 4.8.1 seems to ignore retransmission frames for lora 1.0.2 devices.
I see the following frames in the gateway → LoRaWAN Frames:

[
    {
        "phy_payload": {
            "mhdr": {
                "m_type": "ConfirmedDataUp",
                "major": "LoRaWANR1"
            },
            "mic": [
                143,
                14,
                247,
                193
            ],
            "payload": {
                "f_port": 2,
                "fhdr": {
                    "devaddr": "00a42e43",
                    "f_cnt": 43,
                    "f_ctrl": {
                        "ack": false,
                        "adr": true,
                        "adr_ack_req": true,
                        "class_b": false,
                        "f_opts_len": 0,
                        "f_pending": false
                    },
                    "f_opts": []
                },
                "frm_payload": "d1fc7fb590dd90dbbaec3d"
            }
        },
        "rx_info": [
            {
                "channel": 2,
                "context": "BcXxFA==",
                "crcStatus": "CRC_OK",
                "gatewayId": "a84041ffff21b384",
                "gwTime": "2024-06-27T12:40:44.951627+00:00",
                "metadata": {
                    "region_common_name": "EU868",
                    "region_config_id": "eu868_1"
                },
                "nsTime": "2024-06-27T12:40:12.076005752+00:00",
                "rfChain": 1,
                "rssi": -102,
                "snr": 6.800000190734863,
                "uplinkId": 4500
            }
        ],
        "tx_info": {
            "frequency": 868500000,
            "modulation": {
                "lora": {
                    "bandwidth": 125000,
                    "codeRate": "CR_4_5",
                    "spreadingFactor": 12
                }
            }
        }
    },
    {
        "phy_payload": {
            "mhdr": {
                "m_type": "ConfirmedDataUp",
                "major": "LoRaWANR1"
            },
            "mic": [
                143,
                14,
                247,
                193
            ],
            "payload": {
                "f_port": 2,
                "fhdr": {
                    "devaddr": "00a42e43",
                    "f_cnt": 43,
                    "f_ctrl": {
                        "ack": false,
                        "adr": true,
                        "adr_ack_req": true,
                        "class_b": false,
                        "f_opts_len": 0,
                        "f_pending": false
                    },
                    "f_opts": []
                },
                "frm_payload": "d1fc7fb590dd90dbbaec3d"
            }
        },
        "rx_info": [
            {
                "channel": 1,
                "context": "ANO+rA==",
                "crcStatus": "CRC_OK",
                "gatewayId": "a84041ffff21b384",
                "gwTime": "2024-06-27T12:38:58.970549+00:00",
                "metadata": {
                    "region_common_name": "EU868",
                    "region_config_id": "eu868_1"
                },
                "nsTime": "2024-06-27T12:38:49.081027175+00:00",
                "rfChain": 1,
                "rssi": -102,
                "snr": 9.199999809265137,
                "uplinkId": 38175
            }
        ],
        "tx_info": {
            "frequency": 868300000,
            "modulation": {
                "lora": {
                    "bandwidth": 125000,
                    "codeRate": "CR_4_5",
                    "spreadingFactor": 11
                }
            }
        }
    },
    {
        "phy_payload": {
            "mhdr": {
                "m_type": "ConfirmedDataUp",
                "major": "LoRaWANR1"
            },
            "mic": [
                143,
                14,
                247,
                193
            ],
            "payload": {
                "f_port": 2,
                "fhdr": {
                    "devaddr": "00a42e43",
                    "f_cnt": 43,
                    "f_ctrl": {
                        "ack": false,
                        "adr": true,
                        "adr_ack_req": true,
                        "class_b": false,
                        "f_opts_len": 0,
                        "f_pending": false
                    },
                    "f_opts": []
                },
                "frm_payload": "d1fc7fb590dd90dbbaec3d"
            }
        },
        "rx_info": [
            {
                "context": "AOlCnA==",
                "crcStatus": "CRC_OK",
                "gatewayId": "a84041ffff21b384",
                "gwTime": "2024-06-27T12:37:37.375635+00:00",
                "metadata": {
                    "region_common_name": "EU868",
                    "region_config_id": "eu868"
                },
                "nsTime": "2024-06-27T12:37:26.754444515+00:00",
                "rfChain": 1,
                "rssi": -104,
                "snr": 10,
                "uplinkId": 48620
            }
        ],
        "tx_info": {
            "frequency": 868100000,
            "modulation": {
                "lora": {
                    "bandwidth": 125000,
                    "codeRate": "CR_4_5",
                    "spreadingFactor": 11
                }
            }
        }
    },
    {
        "phy_payload": {
            "mhdr": {
                "m_type": "ConfirmedDataUp",
                "major": "LoRaWANR1"
            },
            "mic": [
                143,
                14,
                247,
                193
            ],
            "payload": {
                "f_port": 2,
                "fhdr": {
                    "devaddr": "00a42e43",
                    "f_cnt": 43,
                    "f_ctrl": {
                        "ack": false,
                        "adr": true,
                        "adr_ack_req": true,
                        "class_b": false,
                        "f_opts_len": 0,
                        "f_pending": false
                    },
                    "f_opts": []
                },
                "frm_payload": "d1fc7fb590dd90dbbaec3d"
            }
        },
        "rx_info": [
            {
                "channel": 2,
                "context": "AZxFjA==",
                "crcStatus": "CRC_OK",
                "gatewayId": "a84041ffff21b384",
                "gwTime": "2024-06-27T12:37:11.929123+00:00",
                "metadata": {
                    "region_common_name": "EU868",
                    "region_config_id": "eu868"
                },
                "nsTime": "2024-06-27T12:36:49.233139388+00:00",
                "rfChain": 1,
                "rssi": -101,
                "snr": 6.5,
                "uplinkId": 21014
            }
        ],
        "tx_info": {
            "frequency": 868500000,
            "modulation": {
                "lora": {
                    "bandwidth": 125000,
                    "codeRate": "CR_4_5",
                    "spreadingFactor": 10
                }
            }
        }
    },
    {
        "phy_payload": {
            "mhdr": {
                "m_type": "ConfirmedDataUp",
                "major": "LoRaWANR1"
            },
            "mic": [
                143,
                14,
                247,
                193
            ],
            "payload": {
                "f_port": 2,
                "fhdr": {
                    "devaddr": "00a42e43",
                    "f_cnt": 43,
                    "f_ctrl": {
                        "ack": false,
                        "adr": true,
                        "adr_ack_req": true,
                        "class_b": false,
                        "f_opts_len": 0,
                        "f_pending": false
                    },
                    "f_opts": []
                },
                "frm_payload": "d1fc7fb590dd90dbbaec3d"
            }
        },
        "rx_info": [
            {
                "channel": 1,
                "context": "BDFXvA==",
                "crcStatus": "CRC_OK",
                "gatewayId": "a84041ffff21b384",
                "gwTime": "2024-06-27T12:36:18.427717+00:00",
                "metadata": {
                    "region_common_name": "EU868",
                    "region_config_id": "eu868"
                },
                "nsTime": "2024-06-27T12:36:12.176370605+00:00",
                "rfChain": 1,
                "rssi": -101,
                "snr": 8.5,
                "uplinkId": 27783
            }
        ],
        "tx_info": {
            "frequency": 868300000,
            "modulation": {
                "lora": {
                    "bandwidth": 125000,
                    "codeRate": "CR_4_5",
                    "spreadingFactor": 10
                }
            }
        }
    }
]

And in the device itself in events I see only retransmission warnings:

{
    "time": "2024-06-27T12:40:44.951627+00:00",
    "deviceInfo": {
        "tenantId": "a2a64bab-0410-4048-9bc7-2ce85c846450",
        "tenantName": "foo",
        "applicationId": "3f6c8906-ebd3-4cf0-8ca2-11929ffeaa08",
        "applicationName": "bar",
        "deviceProfileId": "34e3e918-b409-4bdd-a6df-1a9dc560b78f",
        "deviceProfileName": "baz",
        "deviceName": "22430051",
        "devEui": "b0b353fffe408b9d",
        "deviceClassEnabled": "CLASS_A",
        "tags": {}
    },
    "level": "WARNING",
    "code": "UPLINK_F_CNT_RETRANSMISSION",
    "description": "Uplink was flagged as re-transmission / frame-counter did not increment",
    "context": {
        "deduplication_id": "492106e9-4c0b-4b26-9862-6dbd16d0fdd4"
    }
}

Also the ConfirmedUps are not confirmed by chirpstack?

I found No ack on retransmitted confirmed uplinks that says there is no way to distinguish a reply attack, but te lora 1.0.2 spec (4.3.1.5) states.

The FCnt is not incremented in case of multiple transmissions of an unconfirmed frame (see NbTrans parameter), or in the case of a confirmed frame that is not acknowledged.

So for this devices, it should be ok to retransmit the same fcnt?