mobile

I'm having an issue with Pandora that I never had on my droid turbo. I can't seem to change the songs from my '13 civic steering controls. Even weirder I was able to get it to work randomly with one song then not work then work etc. I noticed this happened on a custom rom so I thought I'd go back to stock and it was still doing the same thing. No issues on google music either. I am on a unlocked Nexus 6 on Verizon, but I find it unlikely that this would be the issue. I also noticed that I've had 2 times where the screen freezes in a split screen. I read this was possibly a custom kernel issue or a hardware issue. I bought the device on swappa so I'm starting to worry that it is a hardware issue. Anybody have this issue at all, or give any input? Thanks.