Hello,

Thank you for reporting that you are unable to summon your retainer and getting stuck as a result. We're sorry that you are having to deal with this and we will immediately pass this off to development for you. Upon confirming the issue; it will be handled accordingly. Any adjustments or fixes will be posted on the Official Final Fantasy XIV Lodestone site.
http://lodestone.finalfantasyxiv.com/pl/index.html

If we receive any updates or need any additional information, we may unlock the thread and post here.

Please also check in with our support center at the following link:
http://support.na.square-enix.com/
FINAL FANTASY XIV > Contact > Get Support.
If this occurs on a consistent basis, they may be able to provide some suggestions on how to resolve this issue.

Thank you,
SQUARE ENIX Moderator