Device "capricorn" (Xiaomi Mi 5s) not connected as "phone" to my cars bluetooth device (HFP problem?)

Hi,

I have difficulties with my "capricorn" device: It doesn't get recognized as "phone" by my bluetooth car-cit. I think there is a problem with Bluetooth "HFP" profile. The original Xiaomi rom doesn't have this problem.

Anybody else has such a problem and knows how to connect it correctly?

Now I wanted to create a bug in the LineageOS Bugtracker. Unfortunately I can't find it in the device list.

see picture

Is there a reason for it? Will this device be enabled in the bugtracker in the future?

Regards wwwebrat