Unexpected RuntimeException after clicking on a deleted folder

Start two instances of the CMS, one under UserA, the other under UserB.
Create a folder as UserA, delete it as UserB.
After it's disappeared from UserB's view, click on it as UserA.

A message will be displayed in the browser as follows:

=> java.lang.IllegalArgumentException: invalid folder node null

The current URL is (hal48 being my machine's name):

http://hal48:8080/hippo-ecm-quickstart-war-2.12.02-SNAPSHOT/?wicket:interface=:2::::

The rest of the call stack (trace) is attached as well as the Page view (page.csv). I made it a CSV file, and just removed the following header information [Page class = org.hippoecm.frontend.Home, id = 1, version = 0].