Unable to quit exaile

When quitting exaile I get the following trace and exaile keep running. There is no way but kill -9 to terminate it.

INFO : Exaile is shutting down...
INFO : Disabling plugins...
INFO : Saving state...
Traceback (most recent call last):
  File "/usr/lib/exaile/xlgui/tray.py", line 179, in <lambda>
    callback=lambda *e: self.controller.exaile.quit())
  File "/usr/lib/exaile/xl/main.py", line 463, in quit
    self.gui.quit()
  File "/usr/lib/exaile/xlgui/__init__.py", line 434, in quit
    self.main.save_current_tabs()
  File "/usr/lib/exaile/xlgui/main.py", line 439, in save_current_tabs
    self.tab_manager.save_playlist(pl, True)
  File "/usr/lib/exaile/xl/playlist.py", line 1152, in save_playlist
    encode_filename(name)))
  File "/usr/lib/exaile/xl/playlist.py", line 806, in save_to_location
    f.write(buffer.encode('utf-8'))
UnicodeDecodeError: 'utf8' codec can't decode bytes in position 28-30: invalid data