An error / bug in Diablo3

There was an error / bug in Diablo3: my status as a clan leader has dropped to a member, and I can’t return it myself. Leadership was not passed on by me.
In addition, the clan tab has reset the achievement points.
Please help me to resolve the problem

Add the details of your clan to these threads…

Whilst the thread titles only mention chat, the problems detailed in the threads include loot not being announced to clan, clan permissions being unavailable, and clan leaders being unable to invite players to the clan.

Russian Clan VodkaBalalaikaMedved