Unusual Cart Activity – Extremely Large Quantities Being Added Without Orders

[SatishMantri]

Hi everyone,

We’ve noticed some unusual behavior on our Shopify store and are hoping to get some insight from the community or Shopify staff.

Our app has detected repeated instances where extremely large quantities of products — for example, 686,372 units of a single line item — are being added to the cart. However, these do not convert into actual orders and seem unrelated to any legitimate customer activity.

We’re trying to determine whether this is caused by:

• A bot or external traffic interacting with the storefront

• Automated testing tools or third-party services

• Internal Shopify processes or indexing behavior

• A glitch or conflict with another app installed on the store

We've re-checked our app’s logic, and everything appears to be functioning correctly on our end. We're attaching screenshots for reference.

Has anyone else experienced similar issues?
Any suggestions on how to trace or block this kind of behavior would be greatly appreciated.

Thanks in advance for your help!

Best Regards,
Satish

[SatishMantri]

Thanks for sharing! Here's the list of apps currently installed on our store — we’re reviewing them to identify anything that might be causing the issue:

Marketing & Tracking:
TripleWhale, Nabu for Google Feed, Track123, SEO King, SEOn Blog, Digital Darts, Booster Page Speed Optimizer, Klaviyo, Flow, Translate & Adapt, Tidio, Rockit Sales Manager

Conversion & UX:
Opus Cart Upsell, Buy Button: Sticky Add To Cart, Loadify, Trafficy, RT: Size Chart, Section Store, Search & Discovery, Email

Image & Content:
Hextom: Bulk Image Edit & SEO

Social & Reviews:
Zotabox, Judge.me AliExpress, Judge.me Reviews

Dropshipping / Print on Demand:
MadeMine, DSers, Amazon/eBay Sync, Printify, MyDesigns

Others:
MBC Bundles

Could you suggest which app could be triggering this cart issue. Appreciate your help!