Redmine

Dear Redmine,

We have an issue with our current version of Redmine. We have about 50 different projects in our location installation, including some plugins:

Environment:
  Redmine version                3.3.2.stable
  Ruby version                   2.1.2-p95 (2014-05-08) [x86_64-linux]
  Rails version                  4.2.7.1
  Environment                    production
  Database adapter               Mysql2
SCM:
  Subversion                     1.8.11
  Mercurial                      1.4
  Git                            2.3.1
  Filesystem                     
Redmine plugins:
  plantuml_macro                 0.0.1
  redmine_wiki_extensions        0.7.0
  redmine_wiki_lists             0.0.8
  scrum                          0.16.2

Since a day ago, we are having problems with our (sub)projects being re-arranged incorrectly in the breadcrumbs (top left corner) and the drop-down list for project selection in the top-right corner. Please see attached file redmine-bug-breadcrumbs.png).

Even though in the settings page of "Project A" the information is correct (Project A is a subject of Projects, which is a subproject of Development), in the breadcrumbs and drop-down list it shows that Project A is subproject of Development.

It also seems that when we want to move one (sub)project to a different level, many other projects get "moved" unwanted. Is there some cache that needs to be cleared, or do we have some corrupted data in the database?

Thanks!