When I switch rooms, the new message line sometimes doesn't appear

[10wen]

Describe the bug

When I switch rooms, the new message line sometimes doesn't appear.

Steps to reproduce

Describe us how we could reproduce the bug you're trying to report
You can also use https://github.com/antoine92190/vue-advanced-chat-sandbox and share the source code to reproduce the bug.

Example:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior

A clear and concise description of what you expected to happen when you encounter the bug.

Screenshots

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Device (please complete the following information)

• OS: [e.g. iOS, Windows 10, ...]
• Browser: [e.g. Chrome 75, Safari 9]
• Package version: [e.g. 2.2.0]

Additional context

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[MelkonTech]

Is anyone going to contribute to it?
This is still not fixed.