Maybe a potential security problem in 12.5?

In older versions after restart browser I must re-login in plesk admin panel. In new plesk 12.5 I already logged in after restart browser. Who forgot logout and use a pc that public accessible have a potential security break.

Cookie PHPSESSID have this values:

expires 0
host "xx.xx.xx.xx"
isDomain false
isHttpOnly true
isSecure true
maxAge undefined
name "PHPSESSID"
path "/"
rawValue "xxx"
value "xxx"