Main issue: A Shopify product page and a homepage Featured Product display correctly in the Theme Editor (Customize) but fail in theme Preview—product page returns a 404 (not found), and the Featured Product shows the default example instead of the actual product.
Troubleshooting so far:
Suggested cause: the wrong product template may be applied. In Shopify, templates control a page’s layout/sections.
User checked product settings; only “Default Product” template is available and selected. Asked how to add other templates.
Product status confirmed as Active (not draft). Removing/adding the Featured Product section didn’t help.
Evidence: Screenshots show correct rendering in Customize, but Preview shows the default featured block and a 404 on the product page.
Open questions/next steps:
Whether the product has the correct handle/URL in the preview theme and is accessible without editor context.
Whether additional product templates exist in the theme and are correctly named/assigned.
Status: Unresolved. Another participant reports the same issue and asks if a solution was found.
Summarized with AI on December 12.
AI used: gpt-5.
I’m not sure if I got what you mean correctly, but, juding from what you said, there is a chance that the proper template is not applied in the products.
The product is active. I also tried removed and added the “Featured Product” section. It’s weird that it shows up fine on the customization stage but doesn’t on the preview stage. I also get a “404 page not found” on the product page during the Preview stage but not during the customization stage.