Oracle EBS r12.1.3 custom form- Strange issue

Hello,

I have a strange issue when incorporating calendar date List of Values on date fields on a custom EBS form.  I have followed following steps to implement this.

1. Assign subclass "TEXT_ITEM_DATE" to date fields.

2. Assign LOV "ENABLE_LIST_LAMP" to date fields

3. In Key-ListVal trigger,  I have put following code.

"CALENDAR.SHOW"

This works.  However, when I select a date from the calendar, it forces me to respond to following dialog box every single time.

I have to respond to above dialog for EACH OF the date field after selecting a date and hitting OK button on Calendar.  For non-date fields this box does not come up.