Describe the bug

If you view a message containing at most 256 emojis the app may crash.

Reproduction

https://matrix.to/#/#crash-cinny:astralchroma.dev

Expected behavior

Don't crash.

Platform and versions

1. NixOS
2. LibreWolf 146.0.1-1
3. Cinny 4.10.2 (https://app.cinny.in)
4. continuwuity 0.5.3 (587abe9)

Additional context

Probably reproducible with normal Firefox.