I already wrote earlier. I put a clean version of WordPress on a test site. I installed the Storefront theme. Installed plugins – Woocommerce, ACF and ACF for WooCommerce. Created custom fields and placed them in the my-account of the user WooCommerce.
I do not have third-party plugins on the test server, which do not work well.
The only question is the plugin “ACF for WooCommerce”, which saves to the database “field_5ba168bfdcb58”. Why can not this plugin save “user_phone”?