MUC histories still disappearing in 3.9.3 after Server reboot

Hello everybody,

I had the problem in 3.9.2 and had hoped it would have been fixed in 3.9.3 …however…it is not.

When I create a new MUC and join it with requesting the histry everything is fine.

As soon as I reboot the server and join the room again all my history messages are gone!

Is there any solution to this?

Thx in advance