Also see this in dmesg:
[ 505.747613] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 505.747616] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 505.747617] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 510.979305] Bluetooth: hci0 SCO packet for unknown connection handle 258
Also see this in dmesg:
[ 505.747613] Bluetooth: hci0 SCO packet for unknown connection handle 0
[ 505.747616] Bluetooth: hci0 SCO packet for unknown connection handle 0
[ 505.747617] Bluetooth: hci0 SCO packet for unknown connection handle 0
[ 510.979305] Bluetooth: hci0 SCO packet for unknown connection handle 258