Ok, we don’t have the same problem, so there is probably something different about your setup…
What client version are you using?
To solve the problem the client (debug) log would be useful.
If possible, could you post it or send it?
This post describes how to change the client to debug logging, where it is stored and where to send it to if posting is not possible: Having problems with UrBackup? Please read before posting
Thanks!