Volume gets stuck turning up on its own and when volume button tapped
I just bought a used iPhone 6s Plus. If you press the up volume, it turns the volume all the way up, even if you just tapped it and will only stop turning up the volume once rebooted (so the little volume widget on the phone screen stays there indefinitely). The volume buttons push and click fine and do not appear "stuck", so it seems like something internal. I would just stop using the buttons, but sometimes I think the case causes it to press and I get the same issue. Do I need to replace the volume flex cable thingie or the buttons themselves? or both? Thanks.
Is this a good question?