Entire username shown for every user even if no username is duplicated

### Steps to reproduce

1. Where are you starting? What can you see?

Regular room with multiple people.

No one has the same display name.

### Outcome

#### What did you expect?

For each user only the display name should be shown.

#### What happened instead?

The entire handle (username:matrix.org) is shown for every single user even though there are no duplicate display names.

### Your phone model

Google Pixel 9a

### Operating system version

Android 16

### Application version and app store

Element X version: 25.09.0

### Homeserver

hilfikers.com

### Will you send logs?

No

### Are you willing to provide a PR?

No