[Bug]: URL encoding on group names with whitespace

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Creating a user group with whitespace works, but I am unable to view it. This will result in an error because the Group Name seems to be double encoded:

https://cloud.test.tld/settings/users/Test%2520Group - %25 is a %

Setup:

• Nextcloud Hub 25 Autumn (32.0.3) (official Docker image)
• Traefik as ingress

Steps to reproduce

1. Create a group "Test Group" - Use Whitespace
2. Click the group on the left will show an error

Expected behavior

Show content of group

Nextcloud Server version

32

Operating system

Debian/Ubuntu

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

No response

Reproduce the group-navigation failure with a name containing whitespace and trace the settings users group-click entry point that builds the URL. Add a regression test for the encoded group name; done means the URL is encoded once and the group content opens successfully.