We have an nrf5340 audio application, and there were no problems with the previous development.
But when I want to extend the CIS function, especially when enabling bidirectional transmission, an error occurs, but I cannot determine the reason.
00> HL [00:11:23.514,648] <inf> cis_gateway: Stream 0x20003744 stopped. Reason 13
00> HL [00:11:23.514,648] <wrn> cis_gateway: Unknown stream
00> HL [00:11:23.514,678] <inf> cis_gateway: Stream 0x20003524 stopped. Reason 13
00> HL [00:11:23.515,625] <wrn> cis_gateway: Unknown stream
Reason 13 is BT_HCI_ERR_INSUFFICIENT_RESOURCES.
What causes this error? If bidirectional transmission is not started, it works normally.
What I want to know most is what causes this error.