There seems to be a few issues with the moosegoose fight after the newest patch. Sometimes her disarming honk move fails to work at all even if I stand right next to her. She also doesn't keep aggro on players like she used to, sometimes flying away immediately after hitting her. I was playing as Wanda at the time, but I wasn't using any whip weapons just a normal spear and a log suit.
fight the moosegoose next to her nest during spring