When I click on the My Account page it shows improperly. When I make a new page and add the the [woocommerce_my_account]it still has issue. When I switch themes, all is good.
Please deactivate all the plugins not related to the theme and switch the parent theme, check the issue, if the problem remains, make the full backup of your site as well as the Theme settings export and check the issue on the Storefront theme to detect if our theme causes the problem. Storefront is a free theme developed by Woocommerce.