[Bug]: Same Variant gets added to Cart twice

[fxmb]

Package.json file

Medusa 2.4.0

Node.js version

20

Database and its version

16

Operating system name and version

Mac

Browser name

No response

What happended?

We experience a bug in V2 (which already existed in V1) that if we add a product to cart, then leave the page, come back and add it again the product is added as 2 different line items. So you have two line items in the end. It should be adding to the first line item. It is the identical variant and product

Expected behavior

Just one line item overall

Actual behavior

Multiple line items for the identical line item

Link to reproduction repo

N/A

[riqwan]

Hey @fxmb, is this a custom storefront implementation or a starter? If so which one is it?

[fxmb]

This is taken from the B2B starter with no changes to the update Cart logic. It also happened in V1 frequently. I suspect a larger underlying issue

[riqwan]

Thanks @fxmb, can you reproduce it here - https://medusa-b2b-starter.vercel.app/

And send me the cart_id from the cookies? I've tried a few times and can't reproduce it