Debugger report not deleted on Logout

In-Portal has a feature, where page rendering data is collected in background and saved into as "debugger report" file into /system/cache folder.

Once debugger report is read by developer it is deleted. Also debugger reports from expired sessions are deleted too.

However if user pressed Logout link on Front-end or Admin Console, then no session expiration happens and debugger report stays where it was and only occupies disk space without an ability to open it via web interface at all.