How long until this client bug gets fixed?

I go to change my runes and the client refuses to load the page.

https://i.imgur.com/jO5yNxa.png ^What my "edit your runepage" page looks like when it happens. Notice the X right next to Janna's face? So nice of Riot to load the X at least, so I can close the nonexistent window they assume I don't need.

Happens 100% at random as far as I can tell, is fixed by reloading the client until it inevitably happens again later, and completely screws over anybody who doesn't have all of their runepages pre-setup.