I would expect that a session "hidden from list" is not only hidden from list on the manage session page

Once the testing session is closed and all the results have been extracted, I would like to hide the session from everybody for confidentiality purpose.
On https://ihe-conformity-assessment.kereval.com/, I've marked CAS-2.2016-TS2 testing session as hidden from list because I don't want the users from the current conformity assessment session to access the data from this testing session (confidentiality purposes).
But, I can see CAS-2.2016-TS2:
* on the home page
* on the testing session switch page
* on the Connectathon > Find systems page

So I do not understand the purpose of hiding a session if it is only hidden from the admin in the manage session page.
As a work around, I deactivated the testing session but I can still see it on the Find systems page.