Common Shopify theme problems and how to fix them
By Axyra Nova Editorial · 11 September 2026 · 5 min read · Website fixes
Shopify handles servers, security and checkout, which removes a lot of work from running an online shop. What it does not remove is the theme layer: the templates, sections, apps and code that make up your storefront. That is where most problems appear, and most of them quietly cost sales.
This guide covers the most common Shopify theme problems, how to recognise them, and how to fix them without starting again.
How Shopify themes are built
Modern Shopify themes are made of templates, sections and blocks, written in Liquid with CSS and JavaScript. Merchants arrange sections in the theme editor; developers edit the code. Shopify's theme architecture documentation explains how the pieces fit together.
Understanding this structure matters because most fixes involve either rearranging sections or editing one specific file, rather than rebuilding the whole theme.
Problem 1: Slow product and collection pages
Signs: pages take several seconds to show products, especially on phones; images load in late; the page jumps as it loads.
Common causes:
- Large product images uploaded at full camera resolution.
- Apps injecting scripts on every page, even where they are not used.
- Sliders, videos and animations at the top of pages.
- Too many product variants or metafields rendered at once.
Fixes:
- Upload appropriately sized images and let Shopify serve responsive versions.
- Remove apps you no longer use, and check that uninstalled apps did not leave code behind in the theme.
- Replace heavy hero sliders with a single strong image.
- Measure before and after on a phone using the metrics in Google's Core Web Vitals overview.
Problem 2: Leftover code from uninstalled apps
Signs: errors in the browser console, blank spaces where widgets used to be, slow pages that do not improve after removing apps.
Why it happens: some apps add snippets to theme files that remain after uninstalling.
Fix: search the theme code for references to removed apps and delete them carefully, working on a duplicate theme first.
Problem 3: Mobile layout issues
Signs: text overlapping images, buttons that are hard to tap, cramped product grids, menus that do not open properly.
Fixes:
- Adjust section settings for mobile where the theme allows it.
- Add targeted CSS for specific breakpoints.
- Make sure buttons and links have enough space around them for thumbs.
Our mobile-friendly checklist covers what to test.
Problem 4: Broken or confusing navigation
Signs: collections missing from menus, links leading to empty collections or old products, dead pages in search results.
Fixes:
- Review menus against current collections.
- Add URL redirects in Shopify for products and collections that have moved.
- Remove or redirect discontinued product pages rather than leaving them empty.
Problem 5: Product pages that do not answer questions
Signs: customers emailing about sizes, materials, delivery times or returns; high exit rates on product pages.
Fixes:
- Add size guides, material details and care instructions.
- Show delivery estimates and return policy near the add-to-cart button.
- Use clear, high-quality photos from several angles.
Problem 6: Missing SEO basics
Signs: generic page titles, duplicate meta descriptions, images without alt text.
Fixes:
- Write unique titles and descriptions for key collections and products.
- Add alt text to product images.
- Make sure your sitemap is submitted in Search Console. Google's SEO starter guide is a good checklist.
Problem 7: Theme updates you are afraid to install
Signs: an old theme version with known bugs, and heavy customisations that make updating risky.
Fixes:
- Document every customisation and the file it lives in.
- Duplicate the theme and apply updates to the copy first.
- Move customisations into theme settings or separate snippets where possible, so they survive updates.
A safe way to work
- Duplicate the live theme before any change.
- Edit the duplicate and preview it.
- Test on mobile and desktop, including checkout.
- Publish only when everything works.
- Keep the old theme for a while in case you need to roll back.
When to consider a different platform
Shopify suits most product businesses well. If your store is small and your site is mainly about services, WordPress with WooCommerce may fit better; see setting up WooCommerce for a small shop.
How we help
Our sellers fix Shopify, Squarespace and Square Online themes, and our agents check stores for slow pages, broken links and missing SEO basics. See how on the features page, or read about the Squarespace custom code fixes we often handle alongside Shopify work.
A worked example
A small clothing brand noticed that visitors were adding items to the cart but leaving before checkout. A review of the store found several theme-level issues:
- Product pages loaded five apps' worth of scripts, including two from apps uninstalled months earlier.
- Product photos were uploaded at full camera resolution.
- Size information was hidden in a separate page linked from the footer.
- The mobile add-to-cart button sat below a long description, out of view on most phones.
The fixes were made on a duplicate theme: leftover app code was removed, images were re-uploaded at sensible sizes, a size guide was added directly to product pages, and the add-to-cart button was moved higher on mobile layouts. After testing checkout on several phones, the duplicate theme was published.
The brand did not need a new theme. It needed the existing one to be cleaned up and arranged around what buyers needed to decide.
Questions to ask before hiring help
If you bring in a developer for Shopify fixes, ask:
- Will you work on a duplicate theme and show me a preview first?
- Will you document every code change and where it lives?
- How will you test checkout and mobile layouts?
- Will changes survive future theme updates?
- What happens if something breaks after publishing?
A clear process matters as much as technical skill, because your store is earning money while the work happens.
Frequently asked questions
Do Shopify apps slow down my store?
They can, particularly apps that load scripts on every page. Audit apps regularly and remove those you do not use.
Is it safe to edit theme code?
Yes, if you work on a duplicate theme and test before publishing. Never edit the live theme directly.
How often should I update my theme?
Check for updates every few months, and apply them on a duplicate first, especially if your theme is customised.
What is the fastest improvement for most stores?
Resizing images and removing unused apps usually make the biggest difference to speed for the least effort.