Signed items lose their signatures.

When I craft an item, I can see my signature on it...but when someone else examines me, they can't see it. When I traded the item to someone else, they couldn't see the signature still, only a blank space where the signature should be, and when I examined them wearing it, I couldn't see the signature either.
When they traded the item back to me, I could see the signature again, but they still could not see it when I wore it.

I also noticed that SOME of the items I've bought off the market have signatures, but SOME only have an empty space where it looks like a signature should be.

There is obviously a problem here.

I have had the same experience. it saddens me that i can not leave my signature on the jewelry i make for my wife. perhaps i will fill out a bug report.

We appreciate you taking the time to report this error to us. However, there are still some details that we need to collect from you before we are able to investigate this properly. Please use the bug reporting template found Here, and make another post. Thank you!
Also, if possible, please include screenshots illustrating the disappearance of your item signature. Thank you!