Sound mood choosing mechanism
What’s even funny and odd is the game has been playing a battle sounds after leaving an instance, mainly at LA, and if you change maps when it’s still playing the game changes to another game sound :P (this already has been reported in other threads, I just wanted to comment about it here).
I once had the game playing the character select music in-game due to this bug. That was kind of fun because the select music is pretty nice, but most of the time the issue is an annoyance.