How does Duplicati handle offline servers?

I use duplicati to backup to a private ftp server.
Because I am the only one using it, I determine it’s uptime with my phone, on the fly. Thanks to energy saving standy by and the benefits of solid state storage it’s up in seconds.
Nonetheless sometimes it isn’t.
In these cases Duplicati just gets stuck on verifying backend data.
Even if the server comes back online, or another backup whould be on the schedule, duplicati is done for this session.

So have i overlooked an advanced option or is this something to actually improve?