Notice Youtube video playback on the box and playing to Bluetooth speaker / headset is flawless, except I wish Kodi offered means of controlling volume via Minu Wireless Keyboard like you can without audio being set for Bluetooth.
The Bluetooth range support isn’t great under CoreELEC, only get 8ft away from device and It starts going choppy.
Also going through GUI screen via different options via Kodi and CoreELEC sections, the clicking noise often is missed or it comes in really low or chopped.
Bluetooth list often flickering very badly, and see two entries for one detected device.
Also paired my old Sony cell phone, playing music and listening on the paired Bluetooth speaker to the box. Unfortunately the audio cuts out and can be out for minute before returning on paired speaker to device but repeatedly doing this. Not even two feet away with both cell and speaker from the device.
(udevadm info /sys/bus/sdio/devices/sdio*): http://ix.io/27Sc
(systemctl status brcmfmac_sdio-firmware-aml.service): http://ix.io/27Si