### 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)

caret_mid_grapheme_enabled = p_enabled;
}
bool LineEdit::is_caret_mid_grapheme_enabled() const {
	return caret_mid_grapheme_enabled;
}
bool LineEdit::is_caret_blink_enabled() const {
	return caret_blink_enabled;
}
void LineEdit::set_caret_blink_enabled(const bool p_enabled) {
	if (caret_blink_enabled == p_enabled) {
		return;
	}
	caret_blink_enabled = p_enabled;
	set_process_internal(p_enabled);
	draw_caret = !caret_blink_enabled;
	if (caret_blink_enabled) {
		caret_blink_timer = 0.0;
	}
	queue_redraw();
	notify_property_list_changed();
}
bool LineEdit::is_caret_force_displayed() const {
	return caret_force_displayed;
}
void LineEdit::set_caret_force_displayed(const bool p_enabled) {