UD table rows not being created

Anyone ever see UD records not get created for their associated table rows? Just ran into issues with two UD field additions on the Job Head table and Job Oper tables. From what I could tell it seemed like the UD rows were not getting created. So when Epicor was trying to load them into the screens, users would either get an Object Ref error when loading a job, or not see any operations once I cleared the first issue up.

Deleting the new UD tables resolved the issues.

Any idea what could cause this? Gap in time from UD field addition and regen? Version issue? We are running 10.2.500.18