HFP Unknown AT+CSRSF

[GreenGiant]

I am using the hfp ag example, trying to connect to a Blaupunkt Bluetooth speaker that supports HFP. I'm getting errors from the BTM layer and unknown AT commands which google isn't throwing any hits for. Any ideas?

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I (506) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (573) BTDM_INIT: BT controller compile version [c03db76]
I (573) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (673) phy: phy_version: 4180, cb3948e, Sep 12 2019, 16:39:13, 0, 0
E (1253) BT_BTC: btc_hf_cb_handler: Invalid index -1
I (1263) uart: queue free spaces: 8

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W (427457) BT_APPL: new conn_srvc id:5, app_id:0
I (427467) BT_APP_HF: APP HFP event: CONNECTION_STATE_EVT
I (427467) BT_APP_HF: --connection state CONNECTED, peer feats 0x0, chld_feats 0x0
I (427537) BT_APP_HF: APP HFP event: CIND_RESPONSE_EVT
I (427547) BT_APP_HF: --CIND Start.
I (427567) BT_APP_HF: APP HFP event: CONNECTION_STATE_EVT
I (427567) BT_APP_HF: --connection state SLC_CONNECTED, peer feats 0x3f, chld_feats 0x400f
I (427577) BT_APP_HF: APP HFP event: NREC_RESPONSE_EVT
I (427577) BT_APP_HF: --NREC status is: NREC DISABLE.
I (427587) BT_APP_HF: APP HFP event: VOLUME_CONTROL_EVT
I (427587) BT_APP_HF: --Volume Target: SPEAKER, Volume 14
E (427777) BT_BTM: tBTM_SEC_DEV:0x3ffc362c rs_disc_pending=0

I (427787) BT_APP_HF: APP HFP event: CLCC_RESPONSE_EVT
I (427787) BT_APP_HF: --Calling Line Identification.
I (427807) BT_APP_HF: APP HFP event: UNKNOW_AT_CMD
I (427807) BT_APP_HF: --UNKOW AT CMD: +CSRSF=0,0,0,1,0,0,0

I'm also getting the following show up as and error, but I am assuming it isn't an error???

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E (264349) BT_BTM: btm_sco_connected, handle 81