Smite is aimed at the bag of holding. Not at the boss itself.
Going by the rules. When a bag of holding is destroyed. The contents contained within are scattered to the Astral Plane.
Smite is aimed at the bag of holding. Not at the boss itself.
Going by the rules. When a bag of holding is destroyed. The contents contained within are scattered to the Astral Plane.
Boss isn’t fully inside the bag and so isn’t its contents.
Now… if this was the disembodied head of Nixon in a jar that’d be another matter.