I believe the only way you would lose out on your roll is if you were dead and had released just prior to being kicked from the group. It is one of the reasons they prevent you from releasing during real raids and LFR.. because they were never able to fix the problem with people not getting rolls. ( they couldn´t fix the bug, so they prevent you from being in a situation where the bug happens). With world bosses, you can release, and therefore there is the bug.
Also, how was the raid group put together with CRZ. If they used a site like OpenRaid, make sure you leave feedback. The big benefit of those sites is the feedback mechanism can ruin your reputation if you do crap like that.
Also, don´t release on world bosses if it is close to being killed.