Audio delay (aprox 400ms) when using bluetooth headset

Hi all
I’m experiencing a general audio delay, offset aprox 400ms, when using bluetooth headset.
Switching off BT set audio to the correct sync.
This is happening only with Kodi (starting from rev 16 at least). Other players don’t have such offset
The device in use is Samsung Galaxy S7 Edge, it happens with both Android 6.1 and the new 7.0
Anything I can do for helping the investigation, if the problem is confirmed?