Guild Wars 2

The spell 3 of fire attunement with a scepter, Phoenix, sometimes disappear before before explosion.

The phoenix disappear when launch behind an immune to dammage target (Like 5 of focus ele in earth, Obsidian flesh, Mist form the utility of ele, the mist form of ele while down, the immune to dammage when someone go in downstate or rally, anyway all the COMPLETE immunity to dammage, not only pure OR condition dammage one). This is happening every where, nothing special.
This is a bug that happened 100 % of the time I think.

The phoenix can disappear too when fired on some rocks, or hills, or buildings or anything wich is not the ground.
This is not happening every time, it surely depends on where we’re firing the phoenix.

I’ll maybe add a video soon.

I don’t believe this is a bug.

Take the warrior skill, bladetrail, for example. (which operates on a similar mechanic)

If the attack is blocked, absorbed, or hits anything other than a foe, it will not return to the person who has used the skill, since the projectile is destroyed.

1.) Phoenix is not a projectile,
2.) It is Not blockable (checked the skill description).

It sure is either a bug or has design flaw.

The way the phoenix works may relate to how path finding works in gw2. It is suspected that if Phoenix can’t find a return path, it would simply vanish and it does not make sense. Or maybe it does, because all teleportation skills (which also relates to path finding) are flawed (and thus bugged).