Lotus Orb is supposed to reflect projectile-based spells, even when the original caster is spell immune. The projectile would then fizzle (or apply its aoe effect if it has one) on them when still spell immune on impact, but would fully affect them if the immunity wears off before impact.

But some of the newer projectiles do not follow this rule. Instead, they do not get reflected at all. Affected projectiles are:

* Rod of Atos
* Adaptive Strike
* Hurl Boulder (Mud Golem)
* Hurl Boulder (Primal Split Earth)

1. Get a Lotus Orb and cast it on self
2. Have a spell immune enemy
3. Have that spell immune enemy cast one of the named spells onto you

Result: Lotus Orb does not reflect the spell. No projectile is launched.

Expected: Lotus Orb should reflect the spell, launching the projectile back, and eventually affect it or fizzle, depending on whether they are still spell immune on impact or not.

As a comparison, these spells do get reflected: Mist Coil, Shuriken Toss, Drunken Haze, Viscous Nasal Goo, Spawn Spiderlings, Chaos Bolt, Poison Touch, Dragon Tail (dragon form), Ether Blast (Ethereal Blade), Ensnare, Ignite, Fortun's End, Stifling Dagger, Spirit Lance, Shadow Strike, Assassinate, Storm Hammer, Gush, Magic Missile, Viper Strike, Soul Assumption, Shackleshot, Splinter Blast, Wraithfire Blast, Unstable Concoction, Homing Missile, Mystic Snake, Arcane Bolt and Paralyzing Cask. This should prove which behavior is intended.