I wish I had a video of this, but I can't sit around recording myself hoping for seemingly random occurrences to happen.

Anyway, has anyone ever experienced a completed spell that just....fizzles? It mostly happens on my SMN, but I have seen it happen on WHM as well. It usually goes like this:
  • Mob has attention focused elsewhere (no chance for interrupt)
  • Begin casting spell
  • Allow spell to finish (Progress bar completes)
  • Spell just dies after completion (no effect, no casting animation, etc)
  • Frustration

Usually a recast is enough, but it can sometimes happen to me a few times in a row. I wish it were simply an interrupt, but the Progress bar never indicates an interrupt happened. It full on finishes and nothing happens.

Most recently it has happened in Pharos Sirius when attempting to Miasma the crawling zombies during Siren.

Most frequently it has happened in Copperbell Mines (easy) when attempting to Miasma gigas as they run across to attack the wall.

I will say it [I]only/I] happens when targeting mobs, never NPCs or party members.

So...am I the only one here? Bug report? Bueller?