I've had this problem with 2 separate phones, on 2 separate car stereos with completely different audio hardware set ups. So to me the problem is somewhere within the app. It also doesn't do it with all audio tracks, only some of them. And it only does it on my 2 car stereos, never with bluetooth headphones or bluetooth speakers. Only car stereos.
So the problem is while a track is playing, the right channel of the audio gets cut out, not completely, just muffled way down. It also muffles the volume of the left side, but not as bad as the right. Sometimes it'll do that for 2-5 seconds then come right back for a few seconds then go out again, so on & so on. Then on other tracks it won't do it for the entire song. There's no rhyme or reason to when it does it, it's seemingly random.
I've looked around in the settings menu with zero success. I'm not an audio engineer so I have no idea what most of those settings do. I just made modifications to a few of the settings that I think I understood with no success.
Any help is greatly appreciated. I'm just looking to have the music play without getting muffled. I'm not looking for the highest res possible or anything fancy. Just play. This is a new to me problem. I remember never having any problems with PA, it just worked. I've been using it for years now.