Products disappear after few days when added by API (Webservices)

[hk-pack]

Prerequisites

• I understand and accept the project's code of conduct.
• I have already searched in existing issues and found no previous report of this bug.

Describe the bug and add attachments

Hello, I have a Symfony 5 interface that adds 3 products to my website per day through a CRON task. Adding goes smoothly, there's no issue with that.
However, after a few days, the products simply disappear from the site, as if I had clicked "delete", there's no trace of the products anymore, even in database.

For example, it happened today between 2 pm and 6 pm without a single trace, I regenerated my cache around 2 pm, and by 6 pm the products weren't there (the twenty or so products added by the API for the past 4/5 days).

Here are the products present thanks to the cache:

When I click on a product that was here yesterday :

For example, a product added after this disappearance, everything is perfect and in place:

This is the second time in the last 15 days that all my products added via the API have disappeared (I just set up the system). I have no messages in the log, and the products are added perfectly.

New clue :

Here is a product posted this morning:

It is correctly in the database.

I will try to make it disappear.

First clue: products that are only added via the API without having clicked the save button are not visible in the list of products sorted by ID in the back-office. The latest references that should be visible are "verrePLA-SAPH-0-80-19-5-1", "verrePLA-SAPH-0-80-19-4-1", "verrePLA-SAPH-0-80-19-2-1", "verrePLA-SAPH-0-80-19-1-1":

The reference "verrePLA-SAPH-0-80-19-30-1" was manually saved by pressing the save button in the back-office.

Expected behavior

I want the products stays on my website.

Steps to reproduce

Just adding a product with Prestashop Web Services. I don't have any clues to reproduce it.

PrestaShop version(s) where the bug happened

8.0.4

PHP version(s) where the bug happened

8.2-fpm

If your bug is related to a module, specify its name and its version

No response

Your company or customer's name goes here (if applicable).

No response

[hk-pack]

Three 'non-mandatory' parameters were missing:
position_in_category should count the products in the default category and add +1.

$product->addChild('position_in_category', $position_in_category);
$product->addChild('state', 1);
$product->addChild('redirect_type', '301-category');"

Enjoy! 😎😎