Custom Attribute after translate changed in all languages version.

[Ihor-Youx]

Can you reproduce this issue on default Wordpress theme (eg Storefront)?

Yes.

Can you reproduce this issue when all other plugins are disabled except WooCommerce, Polylang and Hyyan WooCommerce Polylang Integration?

Yes

What product versions and settings are you using when this issue occurs?

• PHP: 7.4.20
• WordPress: 5.7.2
• WooCommerce: 5.4.1
• Polylang: 3.0.6
• Hyyan WooCommerce Polylang Integration: 1.5.0
• Browser: All

Steps to Reproduce

1. /wp-admin/options-general.php?page=hyyan-wpi
   In Metas List uncheck Custom Product Attributes
2. Create Product with Custom Attribute
3. Translate this product
4. Translate Custom Attribute

What I Expected

Custom Attribute in different languages

What Happened Instead

The translation of the attribute has also been resaved in the first language version.

[Jon007]

This is reproducible in version 1.5.1
syncCustomProductAttributes() is correctly exiting when _custom_product_attributes synchronisation is not enabled, seems to be carried across by other part of the code

[Jon007]

custom product attributes are now included in the _product_attributes meta so to prevent synchronisation Product Attributes would also have to be deselected in the Settings, WooPoly, Meta.
However this also currently stops other Product Attributes synchronising correctly