My game bogged down when I equipped Sandivestan and attacked enemies with almost every weapon I have. 
(Just except Tenticles SG)

By the way, the background music still running but can't do anything after clicking Sasha's weapon shot.(Didn't even see the animation) 

Never had this problem before the latest update of my game.
(I could still attack the enemy twice when I equipped Sandivestan before today)