iPhone 6+ Muffled/Distorted audio cycles with a Bluetooth headset

While using Apps like Facetime, Skype and Viber there are moments or Cycles of Muffled audio from the Bluetooth headset ( tested on LG Tone Infinim HBS900)

The other party does not hear the muffling.

It seems like there is a cycle or may be some sort of sleep or battery saving mechanism which triggers on and causes this muffled audio.

Has anyone else experience this issue?