[bug] App hangs on creating a new window, with window-state and single-instance installed

## Description

With window-state and single-instance installed, app hangs when creating a new window from single-instance's `init()` function.

## Steps to reproduce

This is the repo to reproduce: https://github.com/hut36/tauri-window-hang

Steps to reproduce with the provided repo:

1. `pnpm i && pnpm tauri build --debug`. This produces tauri-window-hang.exe;
2. Launch the app by double-clicking tauri-window-hang.exe. This opens `Window 1`;
3. Double-click tauri-window-hang.exe, this opens `Main Window`;
4. Close `Main Window`;
5. Double-click tauri-window-hang.exe again, this is to open `Main Window`. App hangs here.

Alternative steps to reproduce the problem with the provided repo:

1. `pnpm i && pnpm tauri build --debug`. This produces tauri-window-hang.exe;
2. Launch the app by double-clicking tauri-window-hang.exe. This opens `Window 1`;
3. Double-click tauri-window-hang.exe, this opens `Main Window`;
4. Quit the app by closing all windows. This is to ensure windows' states are saved to disk;
5. Repeat steps 2 and 3, now app hangs on step 3.

If plugin window-state is removed(comment out line `.plugin(tauri_plugin_window_state::Builder::new().build())`), then it'll be successful to create `Main Window`.

## Expected behaviour

Window is created without any problem.

## tauri info

```
[✔] Environment
- OS: Windows 10.0.22631 x86_64 (X64)
✔ WebView2: 130.0.2849.56
✔ MSVC: Visual Studio 生成工具 2022
✔ rustc: 1.82.0 (f6e511eec 2024-10-15)
✔ cargo: 1.82.0 (8f40fc59f 2024-08-21)
✔ rustup: 1.27.1 (54dd3d00f 2024-04-24)
✔ Rust toolchain: stable-x86_64-pc-windows-msvc (default)
- node: 20.12.0
- pnpm: 9.10.0
- yarn: 1.22.22
- npm: 9.6.3

[-] Packages
- tauri 🦀: 2.1.1
- tauri-build 🦀: 2.0.3
- wry 🦀: 0.47.2
- tao 🦀: 0.30.8
- @tauri-apps/api : 2.1.1
- @tauri-apps/cli : 2.1.0

[-] Plugins
- tauri-plugin-shell 🦀: 2.0.2
- @tauri-apps/plugin-shell : 2.0.1
- tauri-plugin-window-state 🦀: 2.0.2
- @tauri-apps/plugin-window-state : not installed!
- tauri-plugin-single-instance 🦀: 2.0.1
- @tauri-apps/plugin-single-instance : not installed!

[-] App
- build-type: bundle
- CSP: unset
- frontendDist: ../build
- devUrl: http://localhost:1420/
- framework: Svelte
- bundler: Vite
```