I see your point, however my thought was broader than just Josh's fumbling. In my recollection there have been several instances of balls hitting the deck when the Bills have been on defense and they bounce right back to the only opposing player in the vicinity.
I don't have a stat to back it up, but I do remember someone posting some advanced stat several weeks ago showing that the Bills were, I think, the second unluckiest team in the league at the time when it came to "bad luck" bounces. Which I believe included fumble bounces as I just described as well as whose hands a tipped pass ends up in and other odd ball movements of that nature. Maybe someone else can remember what that stat was called and who came up with it. It may have been posted around midseason so perhaps the Bills luck has evened out since then.