Subscription block defaults to logged-in WordPress.com user

[foleynotrose]

Impacted plugin

Jetpack

Quick summary

If you're logged in to a WordPress.com account and try to subscribe to a website, that account takes over the subscription regardless of the email address you put into the subscribe block.

Might be related to this issue? https://github.com/Automattic/wp-calypso/issues/70203

Steps to reproduce

1. Log in to a WordPress.com
2. Sign up to any blog with a different email address.

Might be related to this issue? https://github.com/Automattic/wp-calypso/issues/70203

A clear and concise description of what you expected to happen.

I expect to get a confirmation modal indicating the email address I tried to sign up with, as well as a confirmation email to that address.

What actually happened

1. The confirmation modal pops up with the email address for the account I am logged in to.
2. I get no confirmation email.
3. However, I am automatically subscribed to that blog, without having confirmed via email.

When trying to subscribe via an incognito window, it works as expected.

Impact

All

Available workarounds?

Yes, difficult to implement

Platform (Simple and/or Atomic)

No response

Logs or notes

No response