Water/Wind/Dark Fern S2 must be bugged, right?

A single target S2 that does less damage than S1 (2.4 vs 3.8 multiplier!) with no crazy effect attached to it (decent chance to def break and get you a full bar, but not mind blowing).

Seems like someone fat fingered something somewhere? Maybe it was meant to be ignore defense (2.4 on an ignore defense wouldn't be crazy - water Frieren S3 is 3.7) or be an aoe (the other Fern S2 is a 3.6 aoe).