Issue & Reproduction Steps

Variables created or modified in a subprocess were not merged back into the parent request when getUpdated() was empty or incomplete; only the tracked keys were applied, so new or changed values could be lost.

Reproduce (manual): Create a parent with a Call Activity to a child process. In the child, write variables not initialized in the parent (e.g., via script/flow update). Complete the child and parent; the parent summary shows missing or stale values for those variables.

Solution

• Refactored ProcessMaker/Models/CallActivity.php merge logic into smaller helpers:
  • resolveUpdatedData() keeps legacy behavior, handles empty getUpdated(), or uses the tracked keys.
  • mergeNewKeys() adds keys that exist only in the subprocess data.
  • mergeChangedKeys() adds keys that exist in both but have changed, even if getUpdated() didn’t track them.

The refactor reduces inline branching while ensuring new/changed subprocess variables are merged into the parent without overwriting untouched parent values.

How to Test

Follow reproduction steps from the ticket.

Related Tickets & Packages

• FOUR-28469

ci:deploy