Display names sometimes don't load

### Description

https://matrix.to/#/!xYvNcQPhnkrdUmYczI:matrix.org/$s5QQkOAWpP-7i4qjumctn8pJSIa6gkGB0TjBVnlXa6I?via=matrix.org&via=privacytools.io&via=dendrite.matrix.org

### Steps to reproduce

- ?
- Happened yesterday with another message, also in TWIM room, and again today

However restarting Element can sometimes fix it. This makes me believe that retrying on failed lookups after the rest is loaded would be enough, however I don't know how this works internally.

Logs being sent: yes

### Version information

- **Platform**: desktop

For the desktop app:

- **OS**: Arch
- **Version**: aur/element-desktop-nightly-bin 2021051901-1