As long as I didn't get any suggestion I came to idea to try to update my bluetooth module's firmware which I guess a bit old right now:
[ 16.278794] [ap6210] Final fw_path=/lib/firmware/ap6210/fw_bcm40181a2.bin
[ 16.284490] [ap6210] Final nv_path=/lib/firmware/ap6210/nvram_ap6210.txt
[ 16.307198] [ap6210] download firmware /lib/firmware/ap6210/fw_bcm40181a2.bin
[ 16.665709] [ap6210] Firmware up: op_mode=0x0005, Broadcom Dongle Host Driver mac=ac:83:f3:a8:72:fd
[ 16.735412] [ap6210] Firmware version = wl0: Mar 10 2014 14:59:50 version 5.9
I found this https://github.com/armbian/firmware/tree/master/ap6210 which I think is what I need. Can anyone tell me how do I perform a firmware update?