Anyone ever have phantom volume issues??

[mullaneyiv]

So, a few days ago my Diamonds volume control started wiggin out?? It will at random times, turn itself up to 100% all by itself? It does it everytime for like 5 min when i boot up and wont stop no matter what you do. It also does it at other random times.I was stumpped by it doing that cuz my up volume button worked fine....down too.. I thought it might be water damage, but I knew it hadnt gotten wet?? So I went to sprint to see if they would swap it, which they did and I will have a new one tommorrow. But the techs had no clue what it was and just gave up and placed the order. Has anyone ever had that problem before, or does anyone know what may be causing it? Its not water..and I didnt drop it.. Thx in advance!