Starship prompt newline is not honoured

[BryanPoulin]

Describe the bug

When using starship with ~/.config/starship.toml and add_line = true the command-line cursor is on the same line as the prompt info.

To Reproduce

1. Install starship prompt
2. Enable prompt suport in warp
3. Set add_newline = true in ~/.config/starship.toml
4. See the command line cursor in the wrong place

Expected behaviour

The command prompt cursor should be on the next line like with PROMPT="${PROMPT}"$'\n' added to ~/.zshrc

Screenshots

Left: add_newline = true
Right: with added PROMPT="${PROMPT}"$'\n' to ~/.zshrc

Operating System

MacOS 15.6.1
Ubuntu 24.04

Additional Context

You can use the following command to add a newline to your custom prompt (PS1).

echo -e '\nPROMPT="${PROMPT}"$'\''\\n'/''' >> ~/.zshrc