[client] My rune page and its associated runes have gone for a walk?

Well I didn't notice it until recently but one of my rune pages is just gone. along with any runes in it that were not being used by other pages.

For instance all of my flat AD marks are gone but I have 5 of my armor seals because they are in another rune page. They have not come back. At all.

I noticed this maybe 3 weeks ago when I went to use the page but swiftly forgot after the 40min game. I noticed it again today and thought I should report it. So, I have no idea what would even cause this kind of bug. As far as I know there is no way to delete a rune page? only clear it to make a new one fresh? I had 8 rune pages but now have 7, with my last two always having been empty.

Can I have my old rune page along with those runes please? That ip doesn't grow on trees in the fields of justice.