LG g2 bug kind of
LG d802 found a bug(kind of)
keep ur phone in sound mode ...with all volumes set to max notification , system , sound,
now open the music player and play music on full volume
change to VIBRATE MODE through notification panel and scroll for a few sec on ur home screens volume will drop..though volume will show full if u press volume key up to check
now go back to SOUND MODE from notification panel and scroll/swipe ur home screens for a while it will increase again in a few seconds..( 10 secs or 15 secs)
not tested whether this drop ALSO happens if u r in vibrate mode while listening through earphones
actually there is no need to scroll your home screens the volume will increase and drop anyways.