Hmm, well it's not the best comparison considering it has cheaper electronics, but my Epiphone Les Paul Standard Pro is doing the exact same thing, and it's 100% factory. Sometimes it's just normal light buzz from the amp being on high gain, but if the fingers are taken off the strings and no muting at all, after a couple seconds, it'll start to get that buzz too that softens when I touch the bridge. Perhaps it's just the nature of the beast with these guitars?