All woocommerce attribute order broken with latest version

Same as another topic posted. Somewhere between version 18.2 and 18.5 something has happened that has broken all woocommerce attribute orders. Manual sort would then not work for any attribute and any products using these attributes became unsorted on the live site.

I reverted back to version 18.2 to resolve the issue but please can you fix and confirm when resolved so i can update to the latest version safely without impacting order on front end of site.

Has been a fantastic plugin with no issues until this point. Thanks.