External link of docx-files opened by default in Collabora and not OnlyOffice

I have both Collabora and OnlyOffice installed. When sharing a docx-file as an external link, the document is opened by default in Collabora, although I have ticked OnlyOFFice as the default program for docx-files in settings. If I close the Collabora I am offered the possibility to open the file in OnlyOffice.

When logged in as user and using the filebrowser the docx is opened in the correct editor.
Is this a bug? Where should I in that case report the bug - in the server, OnlyOffice or Collabora section?

Hello
I have the Same problem.

Nextcloud 17.02
Onlyoffice 4.0.0
Collabora 3.5.1