macOS: ⌘++ shortcut misrecognized as ⌘+- when using Pinyin – Simplified input method

[snowflysky]

Describe the bug

On macOS, when the system input method is switched to Pinyin – Simplified, the shortcut ⌘++ is incorrectly recognized as ⌘+-. Tracing the code shows that the physical equals (=) key is mapped to Avalonia’s minus (-) key? But actually, on the keyboard layout, the "+" and "=" symbols share the same physical key.

screenshot

To Reproduce

this.KeyBindings.Add(new KeyBinding { Gesture = new KeyGesture(Key.OemPlus, KeyModifiers.Meta), Command = mainWindowViewModel.DoSomeThingCommand, CommandParameter = "OemPlus" });
this.KeyBindings.Add(new KeyBinding { Gesture = new KeyGesture(Key.Add, KeyModifiers.Meta), Command = mainWindowViewModel.DoSomeThingCommand ,CommandParameter = "Add" });
this.KeyBindings.Add(new KeyBinding { Gesture = new KeyGesture(Key.OemMinus, KeyModifiers.Meta), Command = mainWindowViewModel.DoSomeThingCommand, CommandParameter = "OemMinus" });

AvaloniaApplication5.zip

1. Add and switch to the Pinyin – Simplified input method in macOS.
2. Run minimal reproduction code.
3. Press ⌘++.
4. Observe that the app responds to ⌘+- instead.

Expected behavior

⌘++ should be correctly recognized as ⌘++.

Avalonia version

11.3.8, 12.0.999-cibuild0059812-alpha

OS

macOS

Additional context

This issue does not occur when using the ABC Keyboard input method.

[snowflysky]

This issue seems similar to #19995 . If it is indeed a duplicate, please feel free to close this report.