Interrupted LBs into oblivion

[Valence]

Based on my experience, the game seems to do a swift check on if you're capable of completing an action right before it goes off. That's why actions don't go through when you're stunned or turned into a critter.

The most common version of this occurrence is a SAM pressing Zantetsuken and dying mid-animation, which drains their LB bar (because the game confirmed the LB casted) and also doesn't do any damage (because the game registered that you're dead and are unable to do damage).

In short, no, it's probably not designed to be like this but it functions like this because of how the game does its checking.

Dying before a LB resolves is pretty common and depends whether or not you're still alive after the animation and resolution delay. Stuns and MoN seem to specifically achieve the same result only under extremely tiny, uncommon circumstances (and I have yet to find a stun actually doing this, so far I've only seen MoN).

Also worthy of note but actually working against MoN there, MoN is such a disruptive ability server side that it introduces extreme wonkiness on actions that should lock you in place. For instance, if you get MoN-ed during a Contradance, it will allow you to move around while casting it where it shouldn't be possible. It's very funky how this ability seems to break half the game. Edit: this works on Meteodrive and Spite too, and I haven't tried it but it would make sense that it also works on Chocobastion, Mesotes and other long ass LBs.