DELETE in PM does't work after returning on the page via BACK button (Chrome browser)

Steps to reproduce:

1. Open any folder in private messages.
2. Point one or a few messages via checkbox for the deleting, but don't press DELETE button.
3. Open any another forum page (open a message, for example).
4. Press BACK browser button and then DELETE button.

Actual result:
Firefox , IE 11 - checkboxes are not selected, DELETE button is inactive.
Chrome, Opera 26 - checkboxes are selected, button DELETE is active but after pressing DELETE nothing happens.

Expected result
1. Сheckboxes are not selected, DELETE button is inactive.
2. In all browsers system behavior should be same.