Nope, but another skill with the same setup does and the same thing happens.
And on further testing, this happens with the default Fire skill in the demo too!
EDIT: And Slash too. Oh, and the Ice 1/2/3 and Blizzard spells in the demo have no range whatsoever except the tile directly on top of the user, neither does the Silence skill, or Paralyze, or Fire III, or Flame II, or Quake I. But for whatever reason Flame I works fine...
This is a video of the skills in "action" (posted on an old channel because i'd rather not pollute my main channel). As you can see, most of the skills don't do anything at all. Weirdly, Avalanche worked even though it doesn't usually. Also notice how when Snow Pea used Snowstorm, it only hit the one zombie that wasn't in range of the attack.
Here's the entirety of my plugins:
(Though the issues still happen in the demo)
Wait, I found out the problem! One thing all of them have in common is that they're facing attacks. And upon further testing, I found out for some reason, they only work when aimed downwards (the default direction) and not any other direction. This is a graphic showing what I mean.
It seems that the problem is with facing attacks. They only work when aimed downwards, but when aimed up, left, or right they don't work.