Runepages won't save!

Now i don't know how this can be solved to be perfectly honest, but this issue does screw with you pretty hard. I can be in champ select, I've been filled to another role and i have to improvise a champion and quickly make a runepage for them, But then i find myself lagging as i'm trying to put in the runes. I manage to put them and press save by the time the clock has reached 0. but then puts up the prompt a SECOND TIME asking "do you want to save these runes" and i quickly select yes. when i get into the loading screen, the runes haven't saved. and woo! i'm now in a game playing Lethal Tempo Taliyah! or grasp of the undying Xayah! I'd be more okay with it if the problem was i couldn't put my runes in fast enough, but the fact i'd already saved the runepage BEFORE the timer hits 0. and it prompts me, asking a 2nd time after the timer has already passed 0..... I know that runes aren't a huge deal, except, they shape how you play, and you judge your damage/trading/sustain/tankiness around the runes you normally use. If you happen to use a runepage on a champion that has intentionally been used on that champion (for a reason) then you are gonna find yourself miss-judging damage and things, which can really screw you over at times.