Steps to reproduce

1. Install a Local Environment with the Travel Demo (or use the public one)
2. Delete the URI2RepositoryMapping for tours
3. Import the attached config.modules.multisite.config.sites.travel.yaml for Travel
4. Open a tour (e.g. http://localhost:8080/travel/tours/magnolia-travels/Spectacular-Ammouliani-Island.html)

Expected results

It should be no difference if the mapping for tours is done in the global URI2RepositoryMapping or in the Multisite configuration. The Tour Site should render.

Actual results

I get the 404 Page.

Workaround

Leave the configuration where it is.

Development notes

What I can say after a short debugging session is that the MultiSiteFilter already cuts the URL here.
Therefore, the VirtualUriFilter cannot find a proper match anymore [here