### 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)

return scroll_offset;
}
void LineEdit::insert_text_at_caret(String p_text) {
	if (max_length > 0) {
		
		int available_chars = max_length - text.length();
		if (p_text.length() > available_chars) {
			emit_signal(SNAME("text_change_rejected"), p_text.substr(available_chars));
			p_text = p_text.substr(0, available_chars);
		}
	}
	String pre = text.substr(0, caret_column);
	String post = text.substr(caret_column, text.length() - caret_column);
	text = pre + p_text + post;
	_shape();
	TextServer::Direction dir = TS->shaped_text_get_dominant_direction_in_range(text_rid, caret_column, caret_column + p_text.length());
	if (dir != TextServer::DIRECTION_AUTO) {
		input_direction = (TextDirection)dir;
	}
	set_caret_column(caret_column + p_text.length());
	if (!ime_text.is_empty()) {
		_shape();
	}
}
void LineEdit::clear_internal() {