Command([Fileopendatabase]; serv : file) and notesuiworkspace.opendatabase(serv,file) doesn't open the database with xpages

You have a standard discussion database 8.5.1 (based on the template)Launch this database with the xpage allDocuments.xsp:

Openning the database via bookmark is okay.

But:

Write two agents (one formula, the other with script) to open this database:

Formula: Command([Fileopendatabase]; serv : file)

Script: notesuiworkspace.opendatabase(serv,file)

Fazit: The database always is opened in the standard notes view navigator(!)

Bug or Feature? Is there a workaround?