product variation quantities do not sync properly

[tuckncharco]

🔎 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

*** Had to add the following to functions.php on the theme editor to get quantity to sync on facebook commerce manager

when a product has a variant and needs variant quantities to be managed syncing does not change variant quantity.

🚶‍♀️ Steps to reproduce

*** inventory is used to provide facebook with quantities, if the below option is left blank then quantity is 0 and no longer able to sell on facebook

1. create a product with multiple variants
2. add a custom amount for manage stock?

3. See Incorrect variant quantities on the facebook commerce manager

✔️ Expected behavior

quantities for variants are properly managed

🗃 Logs

filazila isnt connecting at this time, Ill try to add logs in a comment