Vaal temple disconnect/crash closes temple and deletes rooms

Multiple times now ive been in a close to complete Vaal temple..the game will disconnect or crash and when I log back in im outside the temple, its closed and about 8 rooms get deleted. To say im annoyed is an understatement. Multiple times this has happened. Please fix your game. Oh and on a side note.. I play the game with all the sound off because if I don't it crashes every 20 minutes or so.