Connection fails with l2cap error

[julian-weinert]

I'm implementing a really bare-bones test using ESP-IDF (v4.4.1). After some struggles I got it to build and run on an ESP32, waiting for a connection. But as soon as I try to connect a controller it throws an error:
E (26693) BT_BTM: btm_sec_l2cap_access_req: (acceptor) remote features unknown!!sec_flags:0x80

I've dug through but lost track somewhere in the source of esp-idf. I would've liked to make it a discussions post rather than an issue, maybe it would be worth enabling that for the repo :)