AudioClip huge lag on some android devices

Hi,

I have simple application with 1 GameObject (Cube) and AudioSource component. As audioClip I have simple coin pickup sound in wav format (16bit / 44100 Hz / Mono / 0.4sek length / 33KB size). For this file I have unchecked '3D sound' checkbox and changed 'Load type' to 'Load into memory'.

On this Cube is attached script

void OnMouseDown() { audio.Play(); }

My problem is that on Xperia M2 this application has huge lag between my click on Cube and hearing clip (~1 sec). But the same application works well on Galaxy S4. How can I fix this? Is it known issue? Other applications from store work perfect on both devices.

Here is video how it looks