Registration shows on invite even though registration is disabled

Description:

I have set "Registration form" to "Disabled", and entering the URL, the link is correctly gone from the login form.
However, if i go to a private group, and issue a invitation link, the link sends me to a login form where the registration link appears again. The link seems not to be active though, as nothing happens when clicked.

Steps to reproduce:

1. In admin section - Accounts --> Registration set "Registration form" to "disabled"
2. Go to URL of chat to verify in login form link to registration is removed
3. Enter a private group and generate an invite link
4. Access the invite link in a URL - link to registration is back

Expected behavior:

The link to registration should be removed when registration form is set to disabled.

Actual behavior:

Server Setup Information:

• Version of Rocket.Chat Server:
• Operating System: 3.6.2
• Deployment Method: snap
• Number of Running Instances: 1
• DB Replicaset Oplog:
• NodeJS Version: 12.16.1
• MongoDB Version: 3.16.4

Client Setup Information

• Desktop App or Browser Version: app , 2.17.11
• Operating System: Windows 10

Additional context

Relevant logs:

Start by reproducing the issue through a private-group invitation link after disabling the Registration form in Admin > Accounts > Registration. Compare the invite-link login form with the regular login form; done means the registration link is absent or consistently inactive when registration is disabled.