### 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 editable;
}
void LineEdit::set_secret(bool p_secret) {
	if (pass == p_secret) {
		return;
	}
	pass = p_secret;
	_shape();
	queue_redraw();
}
bool LineEdit::is_secret() const {
	return pass;
}
void LineEdit::set_secret_character(const String &p_string) {
	
	
	ERR_FAIL_COND_MSG(p_string.length() != 1, "Secret character must be exactly one character long (" + itos(p_string.length()) + " characters given).");
	if (secret_character == p_string) {
		return;
	}
	secret_character = p_string;
	_shape();
	queue_redraw();
}
String LineEdit::get_secret_character() const {
	return secret_character;
}
void LineEdit::select(int p_from, int p_to) {