Bluetooth is unstable after flashing 12.1 nightlies.

Hi, Guys.
Recently I flashed CM 12.1 nightlies from OPO 12.1S stock rom because of the bluetooth issue.
I had unstable connection and abnormal sound playback after updating to CM12.1S on my OPO.
But I have the same problem about the bluetooth.
Is there any workaround for this?

Thanks, in advance.