by Imbaslap » Tue Oct 20, 2015 2:01 am
don't know what causes it as far as I know. I would try and ask other guilds about it. I know a Russian guild almost got in trouble for having it randomly reset on them.
I would create another ticket on the bugtracker incase as this can be considered a serious issue.
Raid ID numbers change every day though or every crash/restart. I don't understand why but maybe there is a root issue in that area that just resets a certain ID number or something.