This can be caused by using the old designation component instead of the one that was updated with Luminate CRM.  To check go to:
  1. Edit Layout on the donation record.
  2. Select the Custom S-Controls section.
  3. If the "DELETED - Donation Allocate Designation Widget" is in the layout it should be removed.
  4. Once this component is removed select the Visualforce Pages section.
  5. Drag "Donation_Allocate_Designations_Widget" to the appropriate section in the layout.
  6. Select Save.
Now that this component is added it should show the designation instead of a blank white section.