Switching billing address causes Javascript function text to render in front-end checkout payment section

[chris-pook]

With the Braintree payment method enabled, when switching billing address using the dropdown of the customer's saved addresses a ton of javascript gets rendered to the page (looks like PrototypeJS source code). This is really nasty and looks quite scary right in the payment step alongside the customer's payment card details..

Preconditions (*)

1. Magento 2.3.3 installed
2. Braintree payment method enabled

Steps to reproduce (*)

1. Enable and configure Braintree module
2. Register a customer account
3. Add at least one address to the customer account
4. Add a product to cart
5. Go to checkout
6. Proceed to payment step
7. Untick "My billing and shipping address are the same"
8. Select an address from dropdown
9. Click "update"

Expected result (*)

1. The address section should update to reflect the selected address

Actual result (*)

1. The address section updates but includes a lot of javascript code text
   

[m2-assistant]

Hi @chris-pook. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.4-develop instance - upcoming 2.4.x release

For more details, please, review the Magento Contributor Assistant documentation.

@chris-pook do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

---

• Join Magento Community Engineering Slack and ask your questions in #github channel.

[chris-pook]

@magento give me 2.3-develop instance

[magento-engcom-team]

Hi @chris-pook. Thank you for your request. I'm working on Magento 2.3-develop instance for you

[chris-pook]

The above instance request did not work, tryinga 2.4 one...

@magento give me 2.4-develop instance

[magento-engcom-team]

Hi @chris-pook. Thank you for your request. I'm working on Magento 2.4-develop instance for you

[magento-engcom-team]

Hi @chris-pook, here is your Magento instance.
Admin access: https://i-26375-2-4-develop.instances.magento-community.engineering/admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[chris-pook]

Can confirm this is still an issue on 2.4-develop, tested on instance above.