[bug] Can't print an iframe

[tauri-bot]

This issue has been upstreamed from tauri-apps/tauri#13451

Describe the bug

We were considering rewriting our app from Electron to Tauri, but we encountered a problem with printing.
Our app relies on print-js library to print part of the page, which makes a copy of the content to an iframe, however it never starts printing.
Printing using window.print() works fine, but iframe.contentWindow.print() does not, it is not doing anything.

Reproduction

No response

Expected behavior

No response

Full tauri info output

[✔] Environment
    - OS: Mac OS 15.4.1 arm64 (X64)
    ✔ Xcode Command Line Tools: installed
    ✔ rustc: 1.87.0 (17067e9ac 2025-05-09)
    ✔ cargo: 1.87.0 (99624be96 2025-05-06)
    ✔ rustup: 1.28.2 (e4f3ad6f8 2025-04-28)
    ✔ Rust toolchain: 1.87.0-aarch64-apple-darwin (default)
    - node: 22.14.0
    - pnpm: 10.8.1
    - yarn: 1.22.22
    - npm: 10.9.2
    - bun: 1.1.6

[-] Packages
    - tauri 🦀: 2.5.1
    - tauri-build 🦀: 2.2.0
    - wry 🦀: 0.51.2
    - tao 🦀: 0.33.0
    - tauri-cli 🦀: 2.0.0-alpha.8 (outdated, latest: 2.5.0)
    - @tauri-apps/api : 2.5.0
    - @tauri-apps/cli : 2.5.0

[-] Plugins
    - tauri-plugin-opener 🦀: 2.2.6
    - @tauri-apps/plugin-opener : 2.2.6

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../dist
    - devUrl: http://localhost:3000/
    - framework: React
    - bundler: Vite

Stack trace

Additional context

No response