[bug] appWindow.isDecorated() always true

[tauri-bot]

This issue has been upstreamed from tauri-apps/tauri#4859

Describe the bug

import { appWindow } from "@tauri-apps/api/window";
import { ref } from "@vue/reactivity";

let isDecoration = ref();

const getSysInfo = async () => {
appWindow.setDecorations(false);
isDecoration.value = await appWindow.isDecorated(); //always true
};

Reproduction

No response

Expected behavior

No response

Platform and versions

Environment
› OS: Mac OS 11.6.0 X64
› Node.js: 14.19.3
› npm: 8.14.0
› pnpm: Not installed!
› yarn: 1.22.19
› rustup: 1.25.1
› rustc: 1.62.1
› cargo: 1.62.1
› Rust toolchain: stable-x86_64-apple-darwin

Stack trace

No response

Additional context

No response