Shopify app uninstall leftovers: why did the store break after removing an app?
Theme and storefront issues on Shopify often appear as broken layouts, missing content, slow performance, or visual problems after a theme or app change. Sellers should confirm whether the issue started after a code change, app install, or theme customization.
Storefront problems usually happen because theme code, app injections, or asset changes no longer match the current store setup. What looks like a product problem is often a theme or app conflict instead.
Use theme troubleshooting first, then compare any app-related changes against the app support path. If performance also dropped, review the store speed guidance so you can isolate whether the issue is visual only or also affecting page load.
Official URLs to review: