Poison Gas (soulbeast spider family f2) always fires max range, even in melee.

[Daniel Handler.4816]

The skill does not recalculate throwing distance as you get closer to the target. As a result it is unusable in melee because the effect will land 600+ range behind your target.

For contrast, Entangling Web (soulbeast spider family f1) has the same max range, and a similar animation, but it recalculates range correctly.