Image order problem

Hello,

When adding a new product with the REST API module, I make sure that the image order is correct, so that the first image becomes the display image. Since we are using REST API v3, there is no position attribute.

The generated python dictionary has correct order, but the images on the product are not.
In this snippet of generated dictionary you can see the order of images, as you can see in the name of the image file, last number is positional index that indicates what order we want the images in.
"images": [{ "src": "https://mana.hal.si/wp-content/uploads/products/2321049000003_22_0.png", "alt": "Baby majica" }, { "src": "https://mana.hal.si/wp-content/uploads/products/2321049000003_22_1.png", "alt": "Baby majica" }, { "src": "https://mana.hal.si/wp-content/uploads/products/2321049000003_22_2.png", "alt": "Baby majica" }]

Any idea why this could be happening?

Start by reproducing product creation through the REST API v3 with the ordered image dictionary shown in the report, then inspect the created product's image order and display image. Compare the submitted order with the API response to determine whether the order is lost during request handling or by WooCommerce; done means identifying the cause and covering the expected ordering behavior.