R12 Custom Form Loses Focus After WHEN-VALIDATE-ITEM Trigger

  I have migrated a custom form based on TEMPLATE.fmb with underlying seeded and custom tables from 11i to R12.  The custom form loses focus and does not highlight the item value that is in error after firing a WHEN-VALIDATE-ITEM trigger.  The issue only occurs within the EBS environment, not in the 10.1.2.3 Developer Suite environment outside of EBS. 

The form was working correctly in 11i.  This issue only appeared after migrating the form to R12.  I created a simple test form with a WHEN-VALIDATE-ITEM trigger to determine that the issue only occurs within the EBS environment using TEMPLATE.fmb.  Of course, the non-EBS form run in the 10.1.2.3 Developer Suite environment outside of EBS is not based on TEMPLATE.fmb.