Hello,
Smite would not cast on Lagon from either my character directly casting Smite on Lagon nor from Javelin spec’ced to cast Smite on nearby creatures.
I noticed someone in Global chat saying the same thing hours earlier.
PS. Thankfully, I swapped to unskilled Hammer Throw and used Javelin directly on Lagon instead of casting it on the ledge for the heal buff and Smite casting.