On the project item requirement a user can select what Sub-Bom to be applied to the item requirement.  But if a user create a form personalization and add the Sub-BOM to the grid, then the lookup shows all Bom's, and not only those that are connected to the item.

So it seams that the lookup is filtered/defined on the field, and that this gives wrong results when adding form personalizations as seen here.

The suggestion is therefore to go through all lookup methods on all forms, and redesign them to that they are also working when the user adds a field through personalizations.