For who face the issue with Bluetooth, especially who installed any application that related to Bluetooth
For example, bluez.
The best way to solve this issue is by purging them all and install the pi-bluetooth again.
Like this :
sudo apt-get purge pi-bluetooth
sudo apt-get purge bluez
sudo apt-get purge bluez-firmware
After that install the pi-bluetooth
sudo apt-get install pi-bluetooth
It will solve your issue.