Chat preview can overlap chat contents if the message is long enough

If the server has previews-chat enabled and the player types a long message, the preview chat can overlap the chat contents.

How to reproduce

1. Join a server with previews-chat enabled.
2. Ensure you have chat preview enabled in settings.
3. Send a few messages.
4. Type a long message, but don't send it.
5. See how the preview chat can overlap some of the chat contents.