This issue has now been resolved. Glory Guard skills that expired early have been re-added to affected characters and will available while the Glory event is underway. Thank you for your patience!
The MapleStory Team is investigating an event issue that may cause Glory Guard rank skills to expire prematurely on some characters. This appears to affect characters that completed the event quest [Glory] Aftermath after Dec. 4 at 12:00 am UTC.
This article will be updated with additional information as it becomes available. If your character(s) are affected by this issue, you do not need to submit a ticket. We apologize for the inconvenience that this may cause.