Menu not having proper active class

[pitamdey]

URL : ​https://buddypress.org/support/
The Top menu doesn't have proper active class like about,download and news is working fine but their is an issue with the support, get involved and documentation menu

[pitamdey]

There is no active class in this menu

[pitamdey]

This menu has proper active class

[pitamdey]

Can't we add active class to all the menu option

[pitamdey]

We Can fix this by applying active class css to the menu in which it is not working.
Something like this :

#nav li a:active {
	background-color: #dd823b;
}