Limit Break [please learn when to use it or tell others when to]

[ispano]

If you start the encounter with it empty, it won't fill fast enough to easily dispatch the bees. But if you don't use it, it'll stay full on your next try.

In a normal dungeon this is true, for a primal fight, it's not. This is likely what they are referring to. Basically if you wipe and your group ends up in the starting circle again, it will reset when you pull. Otherwise it stays.