Wrong Android app being started by SeaFile client


I am using Android 5.1 with the SeaFile client app 2.1.7.

When I select a file (double tap) in the client app which contains a space/blank in the name, the wrong app is directly started (and not the associated one). The usual Android prompt to select an app is also not shown. The same behaviour seems to happen with long file names.

Is this a bug or am I doing something wrong?