Audio IC

its been over 2 months since my iphone suffered from the well known loop disease in which the mic and audio recording features stopped working. The phone also took around 5 minutes to boot up. I have conducted a lot of research and im pretty sure the audio ic is not working properly however what gets me curious is whenever i restart the iphone it starts working normally and then after 5 to 6 hours the issue comes back again until i restart it again and it works. Anyone know what further action i should take