Have a ESP32 C3 board and am trying to get some bluetooth extended advertsing going

The error's I'm seeing appear to be related to

16:38:29.328 -> E (10603) BT_APPL: bta_dm_ble_broadcast failed
16:38:29.328 ->
16:38:29.328 -> E (10604) BT_BTM: btm_ble_write_adv_enable_complete failed
16:38:29.328 -> E (10606) BT_HCI: CC evt: op=0x2008, status=0xc
16:38:29.328 -> E (10607) BT_APPL: bta_dm_ble_set_adv_params_all(), fail to set ble adv params.
16:38:29.328 -> E (10613) BT_BTM: btm_ble_write_adv_enable_complete failed
16:38:29.328 -> E (10618) BT_HCI: hci write adv params error 0xc

my esp_ble_gap_ext_adv_params_t is using data that's very simular to the sample code from here https://github.com/espressif/arduino-esp32/blob/master/libraries/BLE/examples/BLE5_multi_advertising/BLE5_multi_advertising.ino

Not sure how to troubleshoot this, any advice greatly appreciated

ext_adv_params_1M.type = ESP_BLE_GAP_SET_EXT_ADV_PROP_CONNECTABLE; ext_adv_params_1M.interval_min = 0x30; ext_adv_params_1M.interval_max = 0x30; ext_adv_params_1M.channel_map = ADV_CHNL_ALL; ext_adv_params_1M.filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY; ext_adv_params_1M.primary_phy = ESP_BLE_GAP_PHY_1M; ext_adv_params_1M.max_skip = 0; ext_adv_params_1M.secondary_phy = ESP_BLE_GAP_PHY_1M; ext_adv_params_1M.sid = 0; ext_adv_params_1M.scan_req_notif = false; ext_adv_params_1M.own_addr_type = BLE_ADDR_TYPE_RANDOM; ext_adv_params_1M.tx_power = EXT_ADV_TX_PWR_NO_PREFERENCE;