I couldn’t turn bluetooth on anymore (XA 2). Indicator in System was blinking continuously.
rfkill showed it was soft block.
[root@Beorn nemo]# rfkill ID TYPE DEVICE SOFT HARD 0 bluetooth hci0 blocked unblocked 1 wlan phy0 unblocked unblocked
Unblocking and restarting bluetooth systemd daemon fixed the problem.
rfkill unblock 0 systemctl restart bluetooth.service
Edit: No problem with Xperia X and bluetooth.