I'm trying to get Lu Xun's 4th weapon in the Yi Ling stage. I know the requirements to trigger its arrival and I was doing the 2-player trick to save me time. Everytime I trigger its arrival after defeating Zhuge Liang I look around for it where its supposed to be and its not there at all. It's registere din my history where it is, but no boxes or anything to get it. Anyone else have this happen??