Area2D + CollisionShape2D: inconsistent mouse_enter & mouse_exited events at window border

[Sauermann]

Godot version

v4.0.alpha.custom_build [79a4d78]

System information

Debian 11, Vulkan

Issue description

As a prerequisite, have an Area2D + CollisionShape2D touch the window border.
Now move the mouse from within the Area2D to the outside of the window.
Regularly the final event, that the Area2D receives is mouse_entered.

I would expect that the final event is mouse_exited.

Could be related to #57588, but the triggered events are different.

I also verified that this issue happens on

• Windows 10, v4.0.alpha1.official [31a7ddb]
• Debian 11, v3.4.2.stable.official [45eaa2d]

Steps to reproduce

1. Load and start MRP
2. Move mouse cursor between inside and outside the window
3. Notification on screen and in the console indicate the most recent received events.

Minimal reproduction project

For 4.0: BorderPhysics.zip