Defaultapp in config.php not working after upgrade to 9.1

after upgrading from 9.0.2 to 9.1 the parameter defaultapp in config.php ist not working.

I mainly use ownCloud for calendar sharing. So i set defaultapp to "calendar". With ownCloud 9.0.2 and previous releases everything worked fine. After upgrading to 9.1 the parameter has still the same value, but is not working. The webinterface always opens the files-app by default.


seems to be known and already fixed for the upcoming 9.1.1. When having such issues after an upgrade (especially with a first version of a major release) its advised to check the bugtracker and if no report exists to create a new one.