Hi there, Thanks for getting in touch. We understand you had a Grandmaster Conquest not count towards a Guardian Rank challenge. We're sorry to hear of this. To rule out a temporary issue, you may wish to [url=https://help.bungie.net/hc/en-us/articles/360049199051-Clearing-the-Console-Cache]Clear the Console Cache[/url] if you haven't already tried doing so. If you experience this again, then please consider using your platform's share feature to capture a videoclip of what you experience. If you record such a clip, you can upload it to a site like Imgur or Youtube, and share a link to it here. We'll then investigate.