v647 Update has been completed.

Bug Fix
- Fixed issue where music does not play properly when playing D2 in TB Practice Mode.
- Fixed issue where play result does not save properly.
- Fixed issue where Ranking Board did not show properly.
- Fixed issue where Difficulty changes to Normal in Open Match when using Sort option.
- Fixed issue where fever effect kept showing after Game Over.
- Fixed issue where blind effector did not work properly when using So Happy Gear.
- Fixed preview images of a few Gears.

*You need to update the game to play the game normally after the update period.

Thank you.