Iv noticed that when im cycling through the phones ringtones, there seems to be a crackling noise just before the sound plays. similarly, this happens when im cycling through whatsapp sound settings too...

Iv resetted, used safe mode, software repair all with  no luck. The problem doesnt happen when im listening to sportify though which is odd. If turned off all advanced audio settings aswell..

Its pretty annoying, so amped to have a new sony phone again only to be left with this annoying bug. 

If anyone can shed any light on this id really appreciate it