Dialogs launched from row now doesn't allow to edit lookup columns

I have 3 tables

  • People Table
  • Projects Table
  • Staffing Allocation table.

In staffing allocation table I have a button to adjust allocation of person if he is over booked. on click of this button, i launch a dialog to adjust allocation of the person across all the projects. but i can’t edit the lookup columns on this dialog… any idea what is wrong with my formula?

My Doc - Sanbox

In the above doc, if you go to “Staffing Allocation” table and click on adjust button. it will launch a dialog, here i can’t change the project name in subtable (staffing allocation) , but i can change allocation numbers on slider. the project name here is a lookup table to projects table.