Trundle bug

Since Trundle recieved his buff in 5.12 I decided to play him. While playing I noticed a small bug: Trundle's passive doesn't seem to work with Baron. Trundle's passive heals him whenever an enemy unit dies near him; this also affects jungle monsters, including dragon and Baron, but every time (it happened several times) I was near Baron when we killed him, it didn't heal me. It's just a small bug, but a bug nontheless.