Hello! I’m having the same issue – much like this post: https://wordpress.org/support/topic/product-attributes-disappearing/
All product attributes are visible in wp_terms, wp_terms_relationships and are connected to the correct product in wp_posts.
But when disabling the Object Cache, all the attributes are gone from the shop admin and front-end, but they are still in the DB.
When enabling the Object Cache from WP Dashboard – they are back again.
It does not help to flush the cache. It only helps to enable the cache to be able to show the product attributes.
I’ve seen a few posts about this lately, and since we have about 5000 products with MANY attributes – it is crucial for us to understand what is happening here, so it can be fixed.
Do you have any ideas to why this happens, and how we can fix it?
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