[bug] csp prevents ipc requests on page load/unload when csp: null

[OzymandiasTheGreat]

Describe the bug

I want to run some clean up code on native side when webview reloads, but ipc requests aren't coming through when invoked from pagehide event handler.
I get Fetch API cannot load ipc://localhost/plugin%3Abare-kit%7Cbare_write due to access control checks. Calling same code from anywhere else works fine, it's just the unload handler that causing issues.
I have csp: null in my tauri.conf.json.
I searched for similar issues and couldn't find much, except for #12662 which seems to suggest this issue is also present on page load handlers.
I'm not sure whether this is a bug or I should be using different APIs, but as far as I can see tauri doesn't provide events for webview navigation on JS side.

Reproduction

Try to invoke or emit a rust command from pagehide event handler. CSP prevents the request from coming through.

Expected behavior

I expect the native command to be invoked.

Full tauri info output

[✔] Environment
    - OS: Mac OS 26.1.0 arm64 (X64)
    ✔ Xcode Command Line Tools: installed
    ✔ Xcode: 26.2
    ✔ rustc: 1.91.1 (ed61e7d7e 2025-11-07)
    ✔ cargo: 1.91.1 (ea2d97820 2025-10-10)
    ✔ rustup: 1.28.2 (2025-04-28)
    ✔ Rust toolchain: stable-aarch64-apple-darwin (default)
    - node: 22.12.0
    - npm: 11.6.2

[-] Packages
    - tauri 🦀: 2.9.5
    - tauri-build 🦀: 2.5.3
    - wry 🦀: 0.53.5
    - tao 🦀: 0.34.5
    - tauri-cli 🦀: 2.5.0 (outdated, latest: 2.9.6)
    - @tauri-apps/api  ⱼₛ: 2.9.1
    - @tauri-apps/cli  ⱼₛ: 2.9.6

[-] Plugins
    - tauri-plugin-dialog 🦀: 2.4.2
    - @tauri-apps/plugin-dialog  ⱼₛ: 2.4.2
    - tauri-plugin-clipboard-manager 🦀: 2.3.2
    - @tauri-apps/plugin-clipboard-manager  ⱼₛ: 2.3.2
    - tauri-plugin-fs 🦀: 2.4.4
    - @tauri-apps/plugin-fs  ⱼₛ: not installed!

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../dist
    - devUrl: http://localhost:8081/
    - framework: React

Stack trace

Additional context

No response