Hello,
Does it work fine with a default theme? Please check and let us know + provide a screenshot of the issue.
I do not see the problem with product updating right now.
Also, you can enable WPBakery Page Builder for products https://www.8theme.com/demo/docs/legenda/Plugins/WPBakery_Page_Builder
Use this option to disable the Gutenberg – https://www.8theme.com/demo/docs/legenda/docs/imgs/disable-gutenberg.png , Classic Editor plugin can be disabled then.
Regards