Data loss issue from relationships

Hello Team

Recently I have observed data loss issue from relationships in Aras 12 SP14 (Build 29362) in OOTB environment. This issue is not reproducible every time but frequently.

Below are the steps to reproduce this issue:

1. Create Part and save it.
2. Create new CAD Document under Part item.
3. Open this attached CAD document in new tab.
4. Edit CAD Document and attach different CAD Document under CAD Structure.
5. Click on Done button on CAD Document form.
6. Again, edit same CAD Document and Attached new CAD Document under CAD Structure.
7. Edit CAD Document name property.
8. Save CAD Structure.
9. After saving CAD Structure newly added CAD Document is not visible under CAD Structure.

Regards,

Suhas