Default [Q] [ROM][JB][4.2.2][Blu Vivo 4.3] Car Bluetooth problems

Dear all, I have been playing with the last ROMs that have been publlished for Blu Vivo and Micromax phones. Finally I installed the FeatherLiteEdition JB 4.2.2. By Shivam Bhalla. This is great and works very smothy with many improvements over the original rom. However I have got with this the Android 4.2.2 bluetooth issue that has been reported in many threads that makes the phone unusable with the car's handsfree. The phone connects after a long delay, even synchronizes the agenda but not the list calls. You can receive one single call but when you receive a second call and you end it, the phone freezes mantaining active the bt conection. You have to reset the phone in order to disconnect the device from the bt car.

I would very much appreciate if someone can advice on how to resolve this issue. I have not found any post that deals with the publication of a new Rom to Android 4.4 so probably a downgrade to JB 4.1 will be the only solution. Please, any hints?

Thanks in advance