Back button does not return the page to the previous record

For records on the task table, when navigating via the Next and Previous record buttons, and then using the Back button, the page does not return to the previously viewed record.

1. Go to /task_list.do.
2. Open a record in the list
3. Click on the Next record button on the form header twice.
4. Click on the Back button on the form header.

Note that the page does not return to the previous record.

Actual behavior:
The page refreshes and remains on the same record.

Use the browser Back button rather than the Back button in the form header.