Navigation portlet: Change of display style after an unauthnorized access

• Type: Bug
• Status: Closed
• Resolution: No Longer Reproducible
• Affects Version/s: 6.0.6 GA
• Fix Version/s: 6.1.0 CE RC1, --Sprint 11/12, 6.2.0 CE M2
• Component/s: ~[Archived] WCM > Navigation
• Labels: None
• Environment: Liferay 6.0.6 CE Tomcat bundle

I log in with an Administrator user account. I enter a page where I have added the navigation portlet. I have explicitly chosen display style no 6.
I copy the link of the remove operation on the portlet.
I log out.
I log in as a plain User account
I paste the link on the browser address and get an error page (no address found)
From that point the navigation portlet has lost its display style which is reset to 1.

Strangely enough I have set
navigation.display.style.options=6
in portal-ext.properties to avoid this but it doesn't seem to work, since the display style options are not narrowed to a signle option (i.e. 6), when configuring the portlet, hence the style falls back to 1.

Any ideas?