pull down windows don't stay open

it doesn't work in the forum section, but does in my profile page. . .

Hello Andrew Riter,

I have had a look at this and have found no issue in Chrome or Internet Explorer from a PC. After clicking the ‘More’ button you do need to drop your curser directly down to the list. If you click and then move to the side or below the dropdown list, the list will go away.

Please advise if you are access from something other than Chrome or Internet Explorer from a PC