Hello,
Can you please post a log file of the crash report for the world in question?
I can't do anything with a title of an issue and nothing else to go on.
This is the 1st report EVER of this happening since the armour set was added (in 1.6X iirc).
Cheers,
Me.

Hello,
No crash reports, no logs and no reply to me - guess what? Yup, closing issue, it's probably another mod or something, dunno.
Cheers,
Me.