Thanks Andre. If you took it out of the box , then switched it on checked Mosaic and selected the update then it would have been running v.1.1.0 at that point. Most ( if fact nearly all) of the problems encountered with v1.1.1 updates have been caused by the switch off and wait before requesting the update sequence of events. Your sequence is unusual doing the it straight out of the box .
So I am speculating that you have either a corrupt installation of either v.1.1.1 on the DAC or the app or both. The app is easy to rectify simply by downloading a fresh copy from App Store or Google Play Store depending on your platform. If this does not fix the issue ( after a hard reboot of the DAC) you may need to reinstall v.1.1.1 on the DAC. Please see the later postings in this thread on how to do it:
The other information that could assist in tracing the cause of the problem is the programme source . Is it happening with UPnP files, streaming services or everything? What UPnP server software are you running?
EDIT: Since writing the above I have been looking into the effect of using a factory reset. Unfortunately that will not return the software version currently installed to that installed at the factory. It just returns the configuration settings to factory default.
Hopefully James of dCS will pick up on this and be able to advise further.