Unsealed Spellbook Bug

I was in a game against an opponent using the Unsealed Spellbook rune. And whenever they swapped summoner spells, it only updated one of them. Left the other the same as it was. And when they swapped them again, none of them swapped. My entire team was seeing the same spells. So, we weren't able to tab and tell what spells they had. Just figured I'd get the info out there!