Do composition pieces stay grouped after I add them to a quote?

In the appCatalogUpdated 2 Nov 2026

Short answer

No. A composition adds normal Shopify product lines, each with its own quantity, price and stock.

The header does not become a line, and the pieces do not remain grouped. If a piece is already present, its quantity normally increases; a customized or purchasing-held line stays unchanged and a separate line is added.

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Does returning a custom piece automatically put it back in stock?

No. A return does not automatically put a custom piece back on its stocked variant.

Inspect the returned goods and adjust Shopify stock through your inventory process. Keep the refund and the physical stock correction separate so an unusable or unmatched configuration is not offered for sale.