Dynamic Queue Champion Select Crash (A lot)

Lately i've been experiencing a lot of client crashes during Dynamic Queue Champion Selection.

These crash have all happened during a "Lock" phase (ban locking or pick locking), they happen whether i'm the one locking in or not.

I love Dynamic Queue but these crash are really starting to make me hate it, during the last week, it crashed 3 times.

When a crash happen, the client just freezes and the music stops, like this :

http://puu.sh/oZTgf/013d6c288f.jpg

Then Windows tell me that "League Client isn't responding".