Renaming Rune Pages and Maybe Mastery Pages

For some reason when I try to rename my rune pages and save, it reverts back to its old name and even clicking somewhere else won't let you save if you try to change it again

I noticed that when I deleted a named mastery page (Page 14 named "Amumu") so I could make a new one, the current page 14 (Miss Fortune) became 15 and "Amumu" was back in 14 ._.

I'm gonna try repairing the client, but I was wondering if anyone else was experiencing this

Edit 1: Repaired Client, but the renaming still resets

HOWEVER. I did get around this by renaming and then switching to a different tab so when it asks me if I want to save, it saves the name I typed in. So its doable, just a bit annoying since it goes back to the tab you last used in a match rather than saved like for masteries