Steps to reproduce

1. Enable app
2. Select details for a folder
3. In sharing enable share link
4. Go to link in new window, click on file you want to download

Expected behaviour

File should download

Actual behaviour

Page starts to load something, never completes

Additional info:

right click and opening in new window/tab works as expected i.e. the file starts to download;
disabling the Collabora app restores expected functionality.

NB the Collabora app is only installed for testing purposes and is available to a very small group of users (though see #292 ) and certainly not for documents shared by link.