App Block Deep Link adds to the Login page instead of Account page

We are trying to help our App users add an App Block to their theme with one click.
Following the reference here https://shopify.dev/docs/apps/online-store/theme-app-extensions/extensions-framework#deep-linking the link generated works, just not in the way that it’s intended:

Instead of the App Block being added to the Customers/Account template, it will be added to the Customers/Login template, as the theme editor redirects in the process of adding a button.

I’m referring to “My Digital Content” button shown here, that should be added to Customer’s account page.

This is our link: https://XXXX.myshopify.com/admin/themes/current/editor?template=customers/account&addAppBlockId=XXXXXXX/customer_digital_library_button&target=newAppsSection
We can get the app block to be added to the correct place by first signing up and logging in to a customer account, and then visiting the deep link. But that process is very hard to explain to merchants in a simple way, and we cannot guide them, as the whole process happens within Theme Editor.

Is there any way to add the button to the correct template, without forcing merchant to create and sign in to an customer account just for that purpose?
Thank you!