FFXIV Not Responding on exit

[Briarkiss]

I am having this same exact issue as well as my sound cutting out like Mistmonster. As a further edit, it seems that it only occurs for me when I am in the cue for a duty finder. The sound will cut out and when I exit the game a quick message pops up on the screen saying the "Party composition has changed". There is more to the message but it goes by so quick, I can't catch it all. I hope this helps.