### Godot version

v4.2.dev4.official [549fcce5f]

### System information

Windows 10

### Issue description

`scene/main/node.cpp:1757 - Parameter "p_node" is null.` when attempting to type after using find function. Does not happen in 4.2dev3.

https://github.com/godotengine/godot/assets/3820082/4a2818f7-cc3b-4b46-a0b1-5bc6a85b4abc


### Steps to reproduce

1) Open any script in the script editor
2) Ctrl+F to select some text that exists in the script
3) Hit escape to re-focus the script editor without placing the caret
4) Attempt to type



### Minimal reproduction project

[find-mrp.zip](https://github.com/godotengine/godot/files/12555561/find-mrp.zip)

if (!selecting_enabled) {
		return;
	}
	if (p_from == 0 && p_to == 0) {
		deselect();
		return;
	}
	int len = text.length();
	if (p_from < 0) {
		p_from = 0;
	}
	if (p_from > len) {
		p_from = len;
	}
	if (p_to < 0 || p_to > len) {
		p_to = len;
	}
	if (p_from >= p_to) {
		return;
	}
	selection.enabled = true;
	selection.begin = p_from;
	selection.end = p_to;
	selection.creating = false;
	selection.double_click = false;
	queue_redraw();
}
bool LineEdit::is_text_field() const {