Unable add product to cart in Magento 2.3.3 backend when stock quantity is 1 - "The requested qty is not available"

[wibbel]

The problem is only shown in the 2.3.3 backend when making orders from Magento Admin. Any product that is added to te order that only has available stock of 1 displays "The requested qty is not available". Quantities of greater than 1 are fine.

Preconditions (*)

1. Magento 2.3.3
2. Standard luma system
3. From Admin backend, modify one of the products so that quantity in stock is 1 e.g. Joust Duffle Bag

Steps to reproduce (*)

1. Create a new customer order from backend, e.g select existing customer , roni_cost@example.com
2. Add the product to the cart that was changed to have stock of 1 e.g. Joust Duffle Bag

Expected result (*)

1. product is added to cart without errors

Actual result (*)

1. Error message is displayed "The requested qty is not available"

[m2-assistant]

Hi @wibbel. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.3-develop instance - upcoming 2.3.x release

For more details, please, review the Magento Contributor Assistant documentation.

@wibbel do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

---

• Join Magento Community Engineering Slack and ask your questions in #github channel.

[wibbel]

@magento give me 2.3-develop instance

[magento-engcom-team]

Hi @wibbel. Thank you for your request. I'm working on Magento 2.3-develop instance for you

[magento-engcom-team]

Hi @wibbel, here is your Magento instance.
Admin access: https://i-25675-2-3-develop.instances.magento-community.engineering/admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[wibbel]

Confirmed on test instance

[m2-assistant]

Hi @ajijshekh123. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

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  Details

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• 3. Add Component: XXXXX label(s) to the ticket, indicating the components it may be related to.

• 4. Verify that the issue is reproducible on 2.3-develop branch

  Details

  - Add the comment @magento give me 2.3-develop instance to deploy test instance on Magento infrastructure.
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[ajijshekh123]

Give me @magento give me 2.3-develop instance

[magento-engcom-team]

Hi @ajijshekh123. Thank you for your request. I'm working on Magento 2.3-develop instance for you

[magento-engcom-team]

Hi @ajijshekh123, here is your Magento instance.
Admin access: https://i-25675-2-3-develop.instances.magento-community.engineering/admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[ajijshekh123]

I have verified this issue. I have reproduced this issue.
Please see attached the video:

@wibbel - When the user clicks on the "Update Items and Quantities' button, This error will be gone.