No logout after Voucher-expired! Beta 1.3b18

Hi cracks,

(gruezi alli zämme)

due to some members of my family, I am really hot to use the CP with  
Voucher-Options.

First steps, upgrading to 1.3b18, I managed, it seems, good.

login and voucher-test ist working well.

BUT - once the voucher is expired, client is NOT disconnected  
really!?? It believes connected to the internet...;-(

What or where could be the mistake of this!??

Thanks

Ralf