Items Crafted By Others Lost Signature After Maintenance

Before the maintenance yesterday, all of the items I had crafted and all of the items my friends had crafted for me contained a signature on them (at the bottom of the item description box). This included items in both my armory chest and inventory. After logging back in after the maintenance, all of the items I had crafted still contained their signatures, but the ones that other players had made for me no longer had a signature on them. Those pieces are now just like any other piece of equipment bought from an NPC, except some were actually HQ items. :(

Today, the items from my friends still don't have their signatures, even after logging out and back in again in hopes that this would help fix it since my signatures were still showing up. There is extra space at the bottom of the item's description box where the signature was and should be, but it is blank... like it's just not showing up or something. Please SE, fix this! I want my signed items back! :(