Hello there, Thank you for reaching out. We understand that not everyone who joins your Fireteam is being summoned. You may wish to review your [url=https://help.bungie.net/hc/en-us/articles/4403006598164-Destiny-2-Cross-Play-Guide]Cross Play[/url] settings, so as to ensure they aren't interfering with your ability to play with others using different platforms than your own. Our [url=https://help.bungie.net/hc/en-us/articles/25787853699220-Fireteam-Finder-Guide]Fireteam Finder Guide[/url] may also prove helpful. If, however, you continue to experience this issue, then let us know whether you notice any error codes when this happens, or other details which seem relevant. We'll then review.