I did a bit of checking why x86 Windows is failing and it looks like most certainly regression from #794 . The actual C_WrapKey is failing in rsaWrapUnwrapPvt which is called only for CKM_RSA_AES_KEY_WRAP.
I was looking through the code but don't see anything obvious so it will probably need debugging. It should be noted that x86 is the only 32bit build so it might be a generic 32bit issue so it might be reproducible on Linux 32bit as well potentially.
If no one finds out, I will try to setup VM later and see if I can recreate it on 32bit Linux.