Non-embedded Windows receive NOTIFICATION_WM_MOUSE_EXIT notification on startup on Windows platform

[Sauermann]

Godot version

v4.0.beta2.official [f8745f2]

System information

Windows 10

Issue description

Non embedded windows receive the NOTIFICATION_WM_MOUSE_EXIT notification on startup, when the mouse is not over their area without there being a NOTIFICATION_WM_MOUSE_ENTER before.

Steps to reproduce

Setup a project like this:

Configure, that the root window doesn't embed windows.

SceneTree:

• Control
  • Window

The Window has the following script attached:

extends Window


func _notification(what):
	if (what == NOTIFICATION_WM_MOUSE_ENTER):
		print("enter")
	if (what == NOTIFICATION_WM_MOUSE_EXIT):
		print ("exit")

This is the content of the MRP.

Run the project while the mouse is outside of the area, where the Window appears. This causes the following output:

exit

I would expect, that there is no output like it is on linuxbsd.

Minimal reproduction project

BugNoWMEnterNotification.zip