Greetings, Aethlewyn Owren!

Thank you for your patience while your concern was being investigated, and we apologize for any inconvenience this has caused you. After thoroughly investigating this issue, the development team found that the game is closing through something clientside, and not as a result of server side disconnections, so they recommend that your client and network environment. If you continue to experience issues after double checking your system and connection, please submit a new report, and we will make sure to escalate your details to the development team for further review. Thank you again for your patience and understanding!

FINAL FANTASY XIV Support Team