If I spend the time to Customize an activity for Threats and Boons and then make a post in Fireteam Finder, once all my members are ready and I Summon Fireteam, all those Customizations are “lost”. For example, if I take time to Customize a Grandmaster version of Inverted Spire, after I Summon Fireteam the activity resets to the regular match made version. The menu doesn’t let me go back to customize either. I have to press the Director button, go back into Fireteam Ops, reset the activity, and change the difficulty to Customize. Only then will the Threats and Boons appear that I had previously configured.