Open Redirect On Login Page.

Hello, I was doing a bug bounty for a company and stumbled upon an open redirect on the login page ~

Steps to reproduce:

• Go to login page: https://translate.[DOMAIN].com/accounts/login/?next=//google.com
• Replace [DOMAIN] with your instance.
• Login
• User will be redirected to the domain inside the "?next=" parameter.

Results (Expected/Actual):

User should be notified that they are leaving domain or shouldn't be redirected at-all. / Instead user gets redirected without any confirmation or notice.
Portswigger refrence on open redirect: https://portswigger.net/kb/issues/00500100_open-redirection-reflected

Environment

Version: 2.8.2