Location bar confusion

Hello,

Maybe this is completely obvious, but I've been experiencing some oddities
regarding the location bar in Galeon (up to v2.0.0 which I'm using now) that
maybe someone can shed some light on.

Normally, I'll CTRL-L and start typing a URL. If I expect to go to a page in
my history, I'll hit tab and a drop down menu of items matching will appear.
I'll then use the down-arrow key to navigate the menu of history items to
the one I want.

I like this.

Sometimes though, after I hit tab and the menu appears and I hit the
down-arrow key, it won't navigate through the drop down history menu.
Instead, it'll change the URL type in the location to what appears to be a
readline-style history entry, usually a completely different site and not at
all what I want. Using the mouse to click on items in the drop down history
menu does nothing.

Very annoying to me.

New tabs within the window inherit this behavior, but other windows retain
the original behavior. If I completely close out the effected window, and
open a new one, the behaviour reverts to the original way, but sometimes I
have a lot of tabs and I'm reluctant to do so.

Am I accidentally activating a shift in behavior by pressing some magical
key combination? How do I get it back?

Thanks,
Harry