assignment groups expand on back button

[jan_derijke]

I have about 100 assignments in 10+ groups.

I'm always collapsing the groups related to previous modules, otherwise the page gets too big.

The settings of which groups are collapsed are saved when I re-open the assignments section.

However, when I'm in an assignment and go back to the assignments overview page using the browser back button (firefox) all assignment groups are expanded again (and remain so).

I have to recollapse all the groups one by one again.

Hitting back is such a natural reflex that I'm bitten by this often, really annoying.

Anyone has a solution for this bug?

[jan_derijke]

I just remarked today, upon hitting back the modules are expanded, but the icon of the module indicates it is collapsed (firefox).

As mentioned this only happens when I hit back when in an assignment, not when navigating using the assignments menu (left menu bar in course)