Variable products with Missing or invalid images issue

[johndcoy]

🔎 Isolate the bug

• I have confirmed this occurs in the most recent version of WordPress, WooCommerce, and Facebook for WooCommerce.
• I have confirmed this occurs when only WooCommerce and Facebook for WooCommerce are active and when using a default WordPress or WooCommerce theme.

✍️ Describe the bug

When a variable product is newly created in WooCommerce, and the variations are set to "Use variation image" for the Facebook Product Image option, the items are created in Facebook with the "Missing or invalid images" issue.

🚶‍♀️ Steps to reproduce

1. From the Add New Product page, choose Variable product for Product Data
2. Upload an image to the Product Image
3. Add Attributes and use them for variations ( the fewer the better, for testing )
4. Create Variations from attributes.
5. Edit each of the variations to include a price
6. Without including a variation image, set the Facebook Product Image option to "Use variation image" ( https://d.pr/i/OgoLwg )
7. Repeat steps 5 and 6 for all variations.
8. Tick the publish button
9. Check Catalog > Items on Facebook to see the issue:

Screenshot link: https://d.pr/i/nXFATA

✔️ Expected behavior

Although the expected result would be for there to be a missing image message, users should not be allowed to use the option "Use variation image" when no image has been uploaded. Otherwise, the option should fall back on the parent or the WooCommerce Core Placeholder image found under WooCommerce > Settings > Products > Placeholder image.

[johndcoy]

The solution to this issue is to create a new product and set the Facebook Product Image option to "Use parent image." Or...

1. Delete the product from Facebook ( Screenshot link: https://d.pr/i/7intpT )
2. Edit each of the variations to use the parent image. ( Screenshot link: https://d.pr/i/p9t2QN )
3. Click Save changes then Update the product page.

[lauhakari]

Having the same issues as @johndcoy .

All the products in the shop in question have variations set to use "parent image". Have tried deleting them and re adding them to FB but no luck. Still it says the image on some variations is invalid, but other variations on same product can have valid image. Which makes the whole thing very very weird (as they use the same source image).