Southern Prontera has only a single BGM looping

What this problem is related to? (e.g. Game / Launcher / Website / etc. ):

Describe the problem: I’m sure that the southern Prontera has only a single BGM looping.

What was the expected behavior?: I experienced the same track 5 times in a row.

List the steps that occurred before the problem appeared:

Can you reproduce the problem?:

Operating System, Browser version, Antivirus, or any other related platform information (if relevant):

Screenshots/Videos (if available):