Ctrl+z working when editor is not focused

[userNotFoundByDefault]

Describe the bug

Even when the editor option 'useCommandShortcut' is set to false, clicking outside of the editor and pressing Ctrl+Z will undo the last step. Redo is working as expected (pressing Ctrl+Shift+Z outside of the editor does nothing).

To Reproduce

Steps to reproduce the behavior:

1. Go to the examples site of the TUI-Editor and open example 3: https://nhn.github.io/tui.editor/latest/tutorial-example03-editor-with-wysiwyg-mode
2. Click into the editor and type something
3. Click outside of the editor (into the empty area below) . Editor loses focus.
4. Editor does an undo-step.

It is important to note that the issues does not always happen (for me it happens all the time but a colleague is having the issue randomly), so it might be necessary to repeat the steps 2-4. I tried to find out if there is a certain condition for when it always happens but could not figure it out yet.

Expected behavior

Pressing Ctrl+Z does nothing when the editor is not focused (just like Ctrl+Shift+Z)

Screenshots

None

Desktop (please complete the following information):

• OS: KDE neon 6.2
• Browser: Firefox
• Version: 132.0 (64-bit)

Smartphone (please complete the following information):

• Not tested

Additional context

I saw that there is another issues open about the Ctrl+Z feature (#3266). The reason for this bug might be related to it.