Everything lags and on mobile you have to double click buttons!

Hi, Im feeling hopeless here. I dont know anymore. Shopify technical team is now dealing with this issue for hours.

  • I have lagging everything on the store
  • on mobile you need to double click on buttons.

if you know how to help, please check lumelakids.com

Your site is slow mainly because the homepage is overloaded with a very large, deeply nested navigation menu and duplicated header elements, which creates unnecessary HTML and slows down rendering, especially on mobile.

This kind of frontend bloat forces the browser to process too much before the page becomes responsive. I don’t see anything that would inherently require double-clicking links, so that issue is likely device-specific or caused by a script or app interfering with clicks rather than a core site behavior.

Does your mobile you’ve been testing on have the latest OS?

Horizon family of themes is not very good at supporting older browsers.
This can be a reason.

Hi, and how do I fix it. Im not a coder but can handle.

Start with the theme editor in Shopify and simplify the header/navigation. Reduce the number of menu items shown in the main menu, remove any duplicate menus or account/language blocks, and avoid deeply nested dropdowns. Then review your installed apps and remove anything nonessential, since apps often inject extra scripts that slow things down.

For the double-click issue, check if any apps add overlays, popups, or custom cursor/click behavior and disable them one by one to see if it fixes it. Also test switching to a default Shopify theme temporarily - if the issue disappears, it’s coming from your current theme or an app.

Tested with the other themes, issue presisted. This menu I need, these are the products we have.

If it’s happening across themes, it’s almost definitely an app or script causing it, not the menu itself. Even if you need all those categories, you can still reduce the load by simplifying how the menu is structured (fewer nested levels, use “Shop All” pages instead of listing everything in the nav).

Start disabling apps one by one (especially anything related to popups, search, filters, or UX tweaks) and test after each - one of them is likely intercepting the first click. If you don’t want to remove apps blindly, open the browser console (right click → Inspect → Console) and click a link once to see if any errors fire.

Have you tried to update your theme to the latest version?
Horizon (Vessel in your case) is actively updated with fixes.

That double-click thing usually means there’s a javascript conflict or something loading too slow and blocking interactions. Are you running a lot of apps or did you recently add any custom code to your theme? Sometimes one sketchy script can mess up the whole mobile experience.

@cinameltrade I just checked that store but where can you get the double click issue? Can you please share video or specific button here? And I think you need to optimize your website for the site performance and speed.

Yes and yes. Now removed everything what was interferring and it became much faster. BUT! I cant still take away double click from explore button on-mobile.

@cinameltrade When you double click see the inspect. Is there any console error you can find or Network error you got?

Hi, @cinameltrade
I checked your site using PageSpeed Insights:
https://pagespeed.web.dev/analysis/https-lumelakids-com/y54rvb0y67?form_factor=mobile .The report points to render-blocking scripts + heavy JS execution, which directly explains the lag and double-tap issue on mobile (interaction delay happens when the browser is busy processing scripts). it’s theme/app script overload or conflicts.

Here’s How to improve it :
1.Fix the double-tap issue (priority):

  • Disable heavy apps one by one
  • Test after each removal ⇒ you’ll likely find the conflicting script
  • Double-tap usually = first tap blocked by JS

2.Reduce render-blocking scripts (from PSI report)

  • Delay non-critical JS and remove unused apps
  1. Optimize homepage (your site is image-heavy)
  • Compress banners + product images (WebP)
  • Avoid large sliders above the fold
  1. Test with a clean theme (very important)
  • Duplicate your store ⇒ install a fresh theme like Dawn
  • If lag disappears ⇒ your current theme is bloated
  1. Check for overlay / CSS issues
  • Invisible elements (banner) can sit over buttons
  • First tap removes overlay, second tap works ⇒ classic symptom

This is caused by script overload or conflicts (confirmed by your PageSpeed report) - reduce apps, delay JS, and test a clean theme to isolate the issue

If you don’t want to handle this manually, tools like Website Speedy can help automate image optimization and script delay.

Disclaimer : we are the developers of Website Speedy, but it’s completely optional to use.

Hope this Helps!