I have played on SE-02 experimentel server and the tried to vault. My character showed strange behavior. It got crouched and later was set to holding a rifle stance (had no weapons on me) then the game crashed to desktop. Several people got kicked by battleye due to BE client not responding before that, too.
Time after 11.00 on 7.may 2014.
There were a lot of setbacks to my moving at that time, too.