Custom Account Field Results in Broken Registration Page

Description:

I've added a custom text field in the user account setting, this then modifies the registration page. The new field doesn't follow the style of the other input boxes on the register page, see image attached.

Steps to reproduce:

1. Add a new field in Administration -> Accounts -> Registration -> "Custom Fields"
   Code Used:

{"Extension": {
	"public": true,
	"type": "text",
	"defaultValue": "x100",
	"minLength": 2,
	"maxLength": 4
}}

2. Add custom field to Administration -> Accounts -> "Custom Fields to Show in User Info"
   Code used:

[{"Extension": "Extension"}]

3. Visit the registration link

Expected behavior:

I expect the custom field to match the same style as the other input fields.

Actual behavior:

The custom field box does not match the style as the other input fields.

Server Setup Information:

• Version of Rocket.Chat Server: Latest
• Operating System: Linux
• Deployment Method: Snap
• Number of Running Instances: 1
• NodeJS Version: Installed with Snap
• MongoDB Version: Installed with Snap

Client Setup Information

• Desktop App or Browser Version: Vivaldi (chromium) but confirmed on Linux Firefox
• Operating System: Linux

Additional context

Reproduce the issue by configuring the Extension custom field under Administration → Accounts → Registration → Custom Fields, then opening the registration link. Trace the registration form's custom-field rendering and compare it with the other input fields. Done means the custom field matches the registration page's existing input styling in the reported browsers.