Odd occurance at Korvanjund.

[Chukkles]

So I have made it through the dungeon all the way to the end and there is a word of power wall.
I can hear the music that plays near them but as I get closer it turns into static noise and there is no glowing word.
I've never been there before, I went in on the squad mission.

Does anybody have any clues as to what caused this or how to sort it plz?

I'm on X360.

After a quick search I find it should be one of the "Slow time" words, I have 1 already.

 

[Chukkles]

Really no-one?
I have googled the problem, there are other vases but no sign of a fix, other than htis recent update should have sorted it out, but this has only happened since the most recent update.

I think I did get another slow time word but it never added to my inventory, then I can't pick up the last one at all.

Just static noise.