wav files out of phase ?

Hi there,

I can’t help but thinking that after the last upgrade 23rd of april my wav files “sound” different.
Is this possible?

The tracks sound very airy and instrumentation is lost between channels.

Let me try to explain, you know some tracks better than others, for example;
Tears For Fears: Raoul and the kings of Spain: Humdrum and humble,
This track normally begins with a guitarlick from left to right…
In wav it begins left but when it starts to go right volume goes down and sound is fading in the background.

I thought that it was my fault but every flac is performing good, only wav is letting me down.
I have had this problem before but i did a major upgrade on my dac and i didn’t notice it afterwards.
Checked all my wiring and everything should be okay

So, i’m out of options and hoping some of you can point me in the right direction.

Cheers, Paulus