Wants to rebuff "Mage Armor" even though it's already active with 20+ minutes left.

I've had this particular issue for over a month on my mage. In Wow Classic. It works fine for other armors. But "Mage Armor" for some reason isn't recognised properly by Buffomat, so even if I just buffed myself recently, it shows it as me needing it. 

Thanks for a great addon. Btw. 