Unhandled jobState: Blocked

I once got this while scanning multiple sheets:
```
Page downloaded to: /tmp/scan-to-pcW9XfUR/scan2_page1.jpg
Job state: Completed, totalPages: 1:
Start listening for new ScanEvent
New job created: http://192.168.1.53:8080/Jobs/JobList/46
Unhandled jobState: Blocked
Unhandled jobState: Blocked
Unhandled jobState: Blocked
Unhandled jobState: Blocked
```
