It's a bug that's been there ever since ToL went live: https://forums.daybreakgames.com/eq/index.php?threads/item-added-to-bag-sound-on-every-login.279500/ It seems to be caused by the new key achievements. I can log in toons that don't have any, and there is no sound. Switch to a toon that has at least one of the new achievements, and I get the bag drop sound every time. I just don't turn on my sound until all three accounts are in game.
I had not had any game sound on since ~ 2003 So I turned it on, some of the zone music is really nice. We're back to 0 game sound again though =)
Worst part of being a SK, The dang pet cackling constantly. What does old Niblet find so amusing anyway?