Checkout "Out of stock" error

The unexpected behaviour

I have a client who have a handful of reported issues of users receiving this error/warning when reaching the checkout.

Allegedly, no items from what they had visible in their cart were actually removed or sold out.

My client successfully, once, was able to reproduce this error - personally, I have not been able to. According to her, also, no items were actually removed.


My tests

As far as I know, and as far as my practical tests on a development store, when this error occurs normally, the popup actually lists the line items that was removed.

I’ve also tried adding sold out (and even draft) variants using cart permalinks; this triggers the popup - but again, with the sold out variant listed in the popup. Not empty like the screenshot.


Anyone has any ideas or even seen this before?

For reference, the client is using a heavily customized Prestige 10.2.0 theme utilizing Shopify Markets.

Disclaimer; for once not sure how to categorize/tag this issue.

@curzey is the client by chance using markets and different warehouses? In my experience I’ve only seen this error occur when a customer tries to purchase something that is in, lets say a Canadian warehouse in stock, but that customer lives in the US and the company does not allow shipping across borders. I think a certain set of routing rules need to apply as well, but just a thought.

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Hmm that’s interesting, because yes. They indeed do use Markets and different Locations. However I believe that all reported issues actually happened on the default market.

Will look more into that. Thanks!

Edit: Also, this does not seem like expected behaviour? :eyes:

Hi Curzey,

Looks like our team are already investigating this. Will update here when I learn more.

Thats great to hear @Liam-Shopify - should I understand that it’s an issue other merchant also reported, or are they specifically investigating this example?

Let me know if I can provide more information.

There was something similar reported by a different merchant - are you seeing this issue on stores which use cart transform functions?

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Actually we do indeed have a CartTransform running on that store, yes. Have not even considered that one, as it simply just fetches some metafields and, in some cases, changes LineItem titles.

@Liam-Shopify did you get any update on this? As mentioned the shop do have a simple CartTransform running, but we can’t really disable it as that would cause mayhem for their order integration :eyes:

Have just experienced this as well on a store with a Printful integration. Have not been able to replicate it at all. On the same market with the same currency I was able to checkout multiple times. Any more info on this?

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I dont have anything new.

Do you have any cartTransforms running on that checkout?

Still investigating this one folks.

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Shopify Plus store owner here @Liam-Shopify … I am going to need you or another staff member to go ahead and reach out to me over this issue. We have had an abnormal number of customers reach out of the ast week saying they haven’t been able to purchase due to this error…

I am demanding an answer now since you guys have been looking into this for how long?

Just off the number of people who reached out to us, there are probably countless users who have had this error and did not reach out and did not purchase from us.

I am getting really pissed off now…

I also want to point out this message I got from Shopify Support on Mov 13,2024:

This is Gadi from Shopify Plus, I hope you’re doing well!

Thank you for reaching out about the “out of stock” issue that some of your customers have been experiencing. I’ve contacted our technical support team for further insight, and here’s what they shared:

It appears that this issue may be related to a local issue, as refreshing the page has resolved similar instances. Additionally, it seems that this isn’t isolated to a single item; changes made to inventory or location settings could affect multiple products at once, making it difficult for us to pinpoint the cause.

Regarding the potential influence of any third-party apps, while they could be a factor, our team suspects that if the app was interfering with checkout, many customers would likely be experiencing the same issue. Unfortunately, without being able to replicate the problem on our end, we cannot confirm this.

If this continues to be a challenge, I would recommend that you ask your customers who encounter this issue to provide a video recording of their experience. This would help us replicate the problem on our side and get to the bottom of it more effectively.

Please let me know if there’s anything else I can assist you with or if you have further questions!

Best regards,
Gadi | Plus Support Specialist
24/7 Support


This message was Nov of last year and we are STILL getting these issues.

@Drew the issues for me stopped occuring.

First of all, this is a developer forum - not a forum to demand staff support from Shopify. Just to set your expectations. However, I get your frustration.

Have you changed anything on the store since it started happening? Added apps?

Also, is there any Checkout Functions running? You can find this at https://admin.shopify.com/store/{your-store}/settings/checkout scrolling down to the “Checkout rules” section. Could also be those interferring with the checkout and creating this issue.

You do not understand the frustration if you are sitting here telling someone they are wrong for demanding answers from the company they are paying $2,000 a month to and cannot even get a decent solution to issues without having to raise hell… This has been going on for how long and Shopify themselves even said it is a local issue.

So yes, I will sit here on the developer forms and keep bumping this post until one of the PEOPLE THAT WORK AT THE COMPANY… responds. :slight_smile:

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I think you misunderstood my message. I also tried to help - did you check if any functions are running?

The inconsistency of the issue happening and the fact that you seem to see it a lot more than I did (and I dont anymore), really points to something happening on your store specifically.

Have you tried temporarily disabling selected functions, apps or settings to see if that changes anything?