Honestly think it's a bug (Destiny)

by FyreWulff, Sunday, December 15, 2019, 05:24 (1812 days ago) @ Morpheus

Or feels like one. There's been no mention of this in patch notes and you can't even press a button or click on one of the empty slots to quickly pop to the roster to invite someone into the slot

If it's meant to show how many players can come with you on each activity, sure, but maybe they should only make the box appear if you have at least 2 people (because then you're clearly in the invitin' mood). When you're playing solo it just looks like unfinished UI.