### Godot version

 v4.0.beta11.official.91713ced8

### System information

macOS 12.6.1 Monterey, Apple M1 Pro

### Issue description

After reopening scenes with Sprite2D and trying to edit the region of the sprite again the Godot app crashed.

### Steps to reproduce

1. Open scene node_2d in the project files
2. Go to Sprite2D and click on edit region, pop up should show
3. Close the popup and close the scene with X on the tab
4. Reopen the scene, go to Sprite2D and click on Edit region
5. Godot should crash

### Minimal reproduction project

[region_crash.zip](https://github.com/godotengine/godot/files/10400566/region_crash.zip)

if (snap_mode == SNAP_GRID) {
		p_target.x = Math::snap_scalar_separation(snap_offset.x, snap_step.x, p_target.x, snap_separation.x);
		p_target.y = Math::snap_scalar_separation(snap_offset.y, snap_step.y, p_target.y, snap_separation.y);
	}
	return p_target;
}
TextureRegionEditor::TextureRegionEditor() {
	set_ok_button_text(TTR("Close"));
	VBoxContainer *vb = memnew(VBoxContainer);
	add_child(vb);
	node_sprite_2d = nullptr;
	node_sprite_3d = nullptr;