Hi, I’m having the same issue.
product variation is fine, just the category being duplicated after the update.
Is there any solution yet except switching to other theme and disabling all the plugins since this is not working?
also I cant delete and create the categories again because I have too many products and nested categories.
this is the url of the woocommerce website.
on the left sidebar the categories are duplicated. on backend, if I try to delete the duplicated category, the original also removed, and also they have the same category slug and ID.
thanks.