tao: [bug] Black screen on Windows after minimizing a maximized frameless window in multi-monitor setup

Describe the bug

When you have a frameless window with custom titlebar buttons and you maximize, minimize, then maximize again, the entire window sometimes just goes black. Sometimes the window won’t be black, but the buttons no longer function. In the cases where the window isn’t black the window remains responsive to system commands that control the window, such as clicking the application icon in the taskbar in order to minimize it. The behavior seems to be more stable when using toggleMaximize() rather than just maximize() and minimize().

Minimizing the window while not in maximized mode by clicking the application icon in the taskbar appears to fix the button as long as you’re not in maximized mode.

As long as you don’t enter maximized mode the behavior is stable, it’s only when you’ve entered maximized mode that bugs start appearing.

Reproduction

1. Create a new project
2. Set "decorations": "false" in tauri.conf.json
3. Create buttons that run appWindow.toggleMaximize() and appWindow.minimize()
4. Maximize the window
5. Minimize the window
6. Open the window again
7. The minimize and/or maximize buttons now don’t work, and sometimes the window is black

Expected behavior

The window was supposed to be maximized, minimized, then opened again, without buttons seizing to function or the window being black.

Platform and versions

Operating System - Windows, version 10.0.22000 X64
Webview2 - 98.0.1108.50
Visual Studio Build Tools:
   - Visual Studio Community 2019
   - Visual Studio Build Tools 2017
   - Visual Studio Community 2017

Node.js environment
  Node.js - 14.17.4
  @tauri-apps/cli - 1.0.0-rc.4
  @tauri-apps/api - 1.0.0-rc.1

Global packages
  npm - 7.22.0
  pnpm - Not installed
  yarn - Not installed

Rust environment
  rustup - 1.24.3
  rustc - 1.58.1
  cargo - 1.58.0
  toolchain - stable-x86_64-pc-windows-msvc 

App directory structure
/.git
/.github
/.idea
/.nuxt
/node_modules
/src
/src-tauri
/target

App
  tauri - 1.0.0-rc.2 (no lockfile)
  tauri-build - no manifest (no lockfile)
  tao - no manifest (no lockfile)
  wry - no manifest (no lockfile)
  build-type - bundle
  CSP - unset
  distDir - ../public
  devPath - http://127.0.0.1:32146/
  framework - Vue.js (Nuxt)
  bundler - Webpack

Stack trace

No response

Additional context

I believe the issue is related to e.g. booleans being in the improper state, e.g. that using maximize() sets an internal value to keep track of its state, rather than fetching the actual state every time from the system. I have absolutely no idea why the maximized state of the application would influence the ability to minimize the window. So far I’ve only had these issues when using custom buttons with a frameless window, using a normal decorated window has thus far been problem free.

The black window issue only happens sometimes when I try the procedure on one of my monitors, on the other it never happens. On both monitors the buttons no longer functioning occurs. By exiting maximized mode and using system commands to minimize and unminimize the window it would appear that the buttons start to work again, until you break then again.