TPT 15.00 is loading NULL data

Hello,
We are using TPT 15.00.00.03 (LOAD operator) through informatica 9.6.1 hf2. It is giving weird behavior. It is loading first 5-6 columns correct data and all rest of columns in table as NULL. No error message.
If I run same job in other Teradata system where I have TPT 14.10.00.14 with same version of informatica (9.6.1 hf2), it is loading all data correctly.
Is there anybody noticing same issue? Is there any known issue with TPT/TTU 15.00?
Thank you.