Runes Bug

When I enter in the champ select and I want to select my rune page, my personal rune pages just dissapear. There are just the basic ones that I can't even edit. When I press the "+" button to add a new one it makes me choose the class of the new rune page but it redirects me again to a basic one that I can't even edit. P.S. I have 4 bought rune pages and this happens just sometimes. It happened me 3 times in total, 2 times today - 1 time 2 weeks ago.