robnevyn

For what it’s worth, I tried the Square Sync again after updating plugins to WooCommerce 9.0.2 and WooCommerce Square 4.7.0 and the exact same issue still persists.

Thank you for the reply.

“From what I gather, with the latest two releases of WooCommerce Square (4.6.2 and 4.6.3) sync’d products will be assigned the Uncategorized category, when previous to these two releases everything was working as expected — always with Square as SOR. Am I getting this?”
Correct, prior to this everything was working as it should for 8 or so months.

Just to clarify, did you already have a chance to test with a category different than Uncategorized set as default, and rearranging the categories in the screen at wp-admin > Products > Categories, and see if the issue persists, or otherwise?
I have just completed another test using another category called artwork and set it as default. Did another sync and it has the same issue, all existing products (or new products added) are now sync’d with the default category. So whatever the default is, the products will show that default category instead of the correct category as set in the Square account.
The original correct product categories are still listed in the ‘Products >> Categories’ section but have no products assigned to them, they are all appearing on the default category after the sync.
https://snipboard.io/dbzOUT.jpg

Note: that this issue is affecting about 95% of the products, not every product. A few categories remain correct however they do not display any products when viewed by those few categories.