Previously when updating data in a entity/collection-based listbox in 17.x, the listbox variable was required to be assigned to the new data which forced the listbox display to refresh itself as shown below.

Form.LB:=Form.LB.push(4) // Listbox requires reassignment in 17.x

However in the R releases, as long as the collection or entity member functions directly modifies the data, the listbox variable no longer requires to be assigned to reflect the updated data.

Form.LB.push(4) // No assignment required in 17 R