Server 1.215.7 fixes a reliability issue when uploading sharded test products. Previously, the upload could fail with a 404 error right after a shard plan was created, because the server tried to look up the plan by reference before it had fully propagated to the read path. This version removes that lookup race by starting shard uploads directly from the plan ID returned when the plan is created.
- Shard uploads now start using the stable shard plan ID, avoiding 404 errors from delayed plan visibility.
- Upload URL generation and completion also accept the shard plan ID for a consistent flow.
- Older clients continue to work with the server through the original reference-based upload path.