Plants vs zombies garden warfare 2 dead fish chest glitch

Me and Zander226 has found a glitch with the chest at the end of the dead fish side quest. Once with completion you will be given a chest. Normally you can only open it once but with a second player you can open an infinity amount of times. I have a video on it. For ea I apolgize for using it we didn't know how the chest would react. Please fix this so we can live happily.