Not sure if it is a bug in the quest of Salty Detox

[Musou]

Lea reached the entrance of Basin Keep, and fell into water at the last moment that the 2 monster ( Ampery ) were beaten, the anemation of the Boss Angler would be triggered and at the same time Lea would be regenerated to the land.

As every battle encountering a boss, the arena would be protected by a square with fence ( barrier ), however, Lea might be regenerated outside the fence.