This is not a duplicate post but a follow-on one where I have a similar problem with another field.
I have copied the ComboBox:Status_DocumentState from TabPage:PurchTab / Group:Status to TabPage:Overview / Grid:PurchLine as the customer has a requirement to display the PO Approval status on the grid:
But the new field only displays for the first record in the grid:
The answer for my previous post was to use PurchLine as the data source instead of PurchTable but in this case I can't as the field DocumentState only exists in PurchTable.