I'm not saying your Omen is outdated. I'm saying your friend's Omen is likely to be outdated. The bug was in Omen's frontend display code. Meaning, you sent them your threat details fine, they received the data fine, but the code to display your threat on their screen was bugged.
It's a possibility, but we are all supposed to update via Wowace before the raid - next time it happens I'll get both of us to update and see if that fixes it.
Will tell you how it goes.