I assume this is related to the PC libraries in IP5, they are already updated to a newer version in NX12.0.2.
I will follow up in detail and let you know more when I found it out.
could you plesae try the fix suggested here: https://community.plm.automation.siemens.com/t5/Discussion-Forum-NX-Manufacturing/NX12-0-1-MP1-Fix-f...
The problem you are reporting seems similar.
Thanks and regards,