Trying to log out is strange

https://derpibooru.org/users/sign_out (don’t click I guess?)
 
First time I go to log out, I get a in-page 404 error:  
“Sorry, we couldn’t find that. (404)
 
If a link on the site brought you here, chances are we did something wrong. Sorry!
 
Either way, grab a link from the top of the site and see what you can find.”
 
I click again and I’m successfully signed out. Something up? Seems to happen to me on every initial attempt now.

But why would you ever want to log out?
 
Can you not feel the glory of the friendship? Do you not yearn to be loved?

@Background Pony  
uh…this bug has existed for months…try to log out again in the 404 page, it will work.

@JP  
Different taglists.
 
@RIG  
Oh, sorry. I already knew about the needing to be on that page thing; wasn’t aware it was a known thing since it only recently started happening to me and I saw no topic on it at a quick glance. My bad.