User logged out - the time line still visible

hi StackIdeas,

after latest updated I see an another strange behaviour - the user is logged out but the user time line is displayed.

Look at the attached screenshot. The user is logged out and selects the timeline menu item option. It is redirected to the login page - what is correct but below the login form the time line of the user (recently logged in user on this computer) is displayed.

Please help identifying the problem.

thanks as lot in advance
Martin