I updated theme correctly to be compatible with woocommerce latest version.
Current problem is caused by woocommerce plugin. Not related with our theme.
Sometimes, woocommerce price order function doesn't work correctly for variable products.
In your shop, there is in some woocommerce variable products, so price sort is not working correctly now.
Also woocommerce price order doesn't work for some woocommerce third party plugins.
Now I deactivated all woocommerce third party plugins on your dashboard. As next screenshot, product order was changed, but not correct.
I think it would be better to contact woocommerce team to solve this problem quickly. Or they can fixed this issue in next version.
If you have any question, please let me know again without hesitation.
I will help you at the end.
Kind Regards, Amand