When a destination form is configured to pre-populate answers from a previously completed form, Mosaic uses the most recent completion date to decide which form to pull answers from. Re-opening and re-completing a workstep updates that completion date — which can change which form is treated as the most recently finished.

When a form is set up to pre-populate from a previously completed form using the last finished method, Mosaic selects the source form based on completion date, picking the one that was most recently finished.

Re-opening a workstep does not change the form's completion date. While a workstep is in a re-opened state, the form keeps its original completion date.

It is only when the re-opened workstep is completed again that the completion date is updated to the new date.

📌 Note: This is long-standing, intended behaviour — the completion date has always been updated when a workstep is finished, whether for the first time or after being re-opened.

Because re-completing a re-opened workstep writes a new, later completion date to that form, it can change which form Mosaic treats as the most recently finished.

For example, a person has three completed forms:

Without any re-opens, a new form pre-populating using the last finished method would pull answers from Form C, as it has the most recent completion date.

If Form A is subsequently re-opened and completed again in April, its completion date updates to April — making it the most recently finished form. Any new form pre-populating using the last finished method would then pull answers from Form A, regardless of the order in which the forms were originally completed.