Yeah, it might be intended that way. However, it is a bit unusual for the way most of the fights work in the game. Snapping shotting is something I'm super familiar with, I've been raiding since 2.0. However, there is usually an opportunity to apply shields, defensive buffs, etc... after add phase, such as during Sephirot for example. That's why I was leaning towards it being more of a bug than something intentional