Wow I though I was the only one. I have a Z3 compact and am getting the same issue. I've tried MP3, FLAC, SD card, Internal memory. Factory resets. System repair. NUplayer, awesome player all with the same result. The sound eventually loses cohesion after time. I've also had the phone replaced and I get the same problem. Please, please fix as I bought this mainly as a music player where the sound was stunning on Kitkat.
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