Issue with "Add to Cart" Function on Mobile Devices – Not Theme Related

Technical Q&A
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1

Hi everyone,

I’m experiencing a frustrating issue with the “Add to Cart” function across both of my Shopify stores, and I hope someone here can help.

The problem occurs only on mobile devices and only for some customers. On desktop, this issue has never happened. When someone clicks “Add to Cart,” they are redirected to the cart page as usual. However, if they try to add multiple items to the cart, the page crashes, and an error message appears, such as:

“Luxus Titan Armband für Apple Watch Series & Ultra – Elegant & Robust – Bezzos-Shop…” has repeatedly encountered an issue.

After reloading the page, the items are in the cart, but this crash creates a very poor user experience.

I’ve tried switching between multiple paid themes, but the issue persists, so I’m confident it’s not theme-related.

To summarize:

  • The problem only affects some customers.
  • It only happens on mobile devices, not on desktop.
  • It occurs when adding multiple items to the cart.
  • Changing themes hasn’t resolved the issue.

Does anyone have an idea what might be causing this? Could it be a Shopify-related issue, a code error, or perhaps something related to my store settings or apps?

Thank you in advance for any insights!

2

Hey Bezzos, I check the issue there is conflict in the add to card functionality. need to check code level!

1 Like
3

Hello, Thank you. how can I check the code level?

1 Like
4

Hello @Bezzos ,

Please follow to check the JS conflict errors:

Using OS windows
and browser chrome → open the product page → right click anywhere → Click Inspect → Click on console tab → click on erros.

Now you need to work on these errors to fix the issue.

Regards
Guleria

5

thank you very much for the quick feedback. i have checked but no errors are displayed. see picture

Bildschirmfoto 2024-12-25 um 18.02.17.png
Bildschirmfoto 2024-12-25 um 18.02.17.png2680×1586 363 KB

6

Check when atc is not working.
In this case it looks like the product is successfully added to cart.

7

unfortunately you can only see the problem on the cell phone, even a simulation on the pc with iphpne 14 pro max as shown in the picture does not give me the error message.

I have several videos that show the error. it’s more like the page loads too long and crashes. as soon as you reload it then i see the cart