We have upgraded instance from R12.0.6 to R12.1.3.
After upgrade not able to see the attachments at form level only for PO module. for AP GL still we can able to see the old attachments.
Any one aware about the issue please let me know.
I have tried 1518754.1 but no luck.
We have applied the patch 17578079 as suggested by Oracle Support and issue resolved.