It is so annoying - just lost 40.000 cedits, because the system does not manage the problems, when a server can not be reached.

If you start over again, your transaction status is lost and you loose all the advance that you have made in that trip.
Why are open transitions not stored properly? If there is no way to access the server, why not store an intermediate status on the client and then resolve the problem, when the server is functional again???
While I know it is a beta, the handling of server problems is poor as poor can be. And there are far too many server problems now.