Hey, This is a known bug and Bungie are investigating it. [quote]Players may be unable to acquire the Forerunner Exotic from Banshee after completing the Magnum Opus Exotic Quest.[/quote] Quote taken from the [url=https://help.bungie.net/hc/en-us/articles/360054863011-Destiny-2-Year-4-Known-Issues-and-Vital-Information]Current Known Issues[/url] article. Keep an eye on the [url=http://www.bungie.net/en/news]TWAB[/url] and [url=https://twitter.com/BungieHelp?ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Eauthor]Bungie Help Twitter[/url] for updates on the issue.