Teams Account picker list empty on Welcome screen?

We have a shared computer (conference room), on which people sign in into Teams with "This App only". After the meeting, they sign out. Teams restarts and shows the Welcome screen with the text "Pick an account to continue". Suddenly, this list with saved accounts is now empty. Did something changed in the last update(s) of Teams? If it is an improved security/privacy update, why is the text still shown "pick an account..." if this list remains empty?