### 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 (selection.enabled && !p_select) {
		set_caret_column(selection.begin);
		deselect();
		return;
	}
	shift_selection_check_pre(p_select);
	if (p_move_by_word) {
		int cc = caret_column;
		PackedInt32Array words = TS->shaped_text_get_word_breaks(text_rid);
		for (int i = words.size() - 2; i >= 0; i = i - 2) {
			if (words[i] < cc) {
				cc = words[i];
				break;
			}
		}
		set_caret_column(cc);
	} else {
		if (caret_mid_grapheme_enabled) {
			set_caret_column(get_caret_column() - 1);
		} else {
			set_caret_column(TS->shaped_text_prev_character_pos(text_rid, get_caret_column()));
		}
	}
	shift_selection_check_post(p_select);
	_reset_caret_blink_timer();
}
void LineEdit::_move_caret_right(bool p_select, bool p_move_by_word) {