Please fix following behavior that you can map a parent entity's value to child entity's field automatically.

1. Create "1-N" relationships between Entity "A" and "B"
2. Place Entity "B" subgrid on Entity "A" form
3. Open "Search record" window on Entity "B" subgrid
4. Click on "New" button for creating new Entity "B"record
5. Entity "A" value is not mapped automatically on Entity "B"record