Date & Time: 18th May
Frequency: Seemingly permanent issue
World name: Tonberry
Character name: Risetto Ritsune
Class/Level: WHM
Party or solo: Party
In-game time: 13:00am
Area and coordinates: Sanctum (Wedding area)
Description: I have been divorced for over a year by my previous partner. Purchased a platinum wristlet today and tried reserving a time slot for marriage - couldn't work as the NPC stated that the following: Could not annual eternal bond. Your eternity ring is not in your inventory.
To be safe, I've checked my retainers, armory chest and chocobo saddle but did not spot any ring - and went through the isearch string only to come up with the Eternity cake (entered in keywords such as bond, ring, eternal, etc). Spoke to the Square Enix support via the mogstation who stated that this could be a bug, and he did not have the tools to check for the ring in-game.

Would be great if this issue could be resolved soon!