Casting Mystic summons is not blocked preemptively by follower count
1. Cast Rising Colossus or Animated Weapon when your follower count can't support it
This is inconsistent with all mage summon spells, which perform the follower count check prior to initiating casting so you don't waste your time.
2. Observe casting continues
3. Target any location
4. Observe follower count warning
This is inconsistent with all mage summon spells, which perform the follower count check prior to initiating casting so you don't waste your time.
Comments
https://forum.uo.com/discussion/1172/followers-warning-when-casting-summons#latest“
So I agree with @Arroth_Thaiel . It is not a bug, it is a feature.