Fetchplan in BulkEdit

Hello,
I’m using the standard BulkEditAction. My entity has an association address and a nested property address.zipCode.
Problem :
When I open the Bulk Edit dialog, address.zipCode is not loaded because address is not included in includeProperties (so it is not part of the Bulk Edit fetch plan).
As a result, during save, address.zipCode becomes null in my BeforeSave/EntitySavingEvent validation.
I have business logic that checks the zip code, so the save fails although the zip code was already filled before opening Bulk Edit.
How can I add address in the Bulk Edit fetch plan without making it editable?
Thanks!