Broken navigation directions on bluetooth headset

[tolo1987]

Hello,

I just bought a bluetooth hedset (M55 from Plantronics). It works well and I'm happy with it but...

When I'm using any navigation (Google Maps or HERE) I hear broken directions. For example, something like this "tur... left"... or "you've r.... destination".

Why is it so? Is it a problem with this headset or this phone?
How to fix this? Please help me. I bought this headset also to use it with navigation apps but it doesn't work well.

My phone is Xperia L with stock Android.

 

[tolo1987]

Someone is having a very similar problem on Nokia Lumia.
Youtube: "WP8.1 - Problem with Navigation Voice" (sorry I can't paste links here yet).

But on my phone it should all work through A2DP.