### Godot version

4.0.2.stable

### System information

Manjaro Linux 5.15.113-1-MANJARO

### Issue description

When I was trying to figure out #77725 i stumbled upon this:
![image](https://github.com/godotengine/godot/assets/14893831/364b89ce-00b2-4aef-a85e-f10c16936005)

pressing enter results in 
![image](https://github.com/godotengine/godot/assets/14893831/07d53b82-c919-4635-80e2-e1809b6bb11f)


It looks simmilar to #48436 , but it started happening to every code completion and I have absolutely no clue how it happened.

It happened after I moved(using shift+arrow keys to select, tab to indent and alt+arrow keys to move down)  the three dicts in the picture to within the function and added the dict 4.

### Steps to reproduce

Here's roughly what I did 
(might be slightly inaccurate, I was basically messing around to try and see the scope of $77725 when it happened)

1) create an empty script
2) declare a couple of dictionaries
3) declare a function
4) try out code completion within the function
5) create a lambda within the function and try 4) again
6) move the dictionaries' declaration within the function using keyboard shortcuts and try 4)




### Minimal reproduction project

N/A
bool shift_pressed = Input::get_singleton()->is_key_pressed(Key::SHIFT);
	if (p_gutter == main_gutter) {
		if (draw_breakpoints && !shift_pressed) {
			set_line_as_breakpoint(p_line, !is_line_breakpointed(p_line));
		} else if (draw_bookmarks && shift_pressed) {
			set_line_as_bookmarked(p_line, !is_line_bookmarked(p_line));
		}
		return;
	}
	if (p_gutter == line_number_gutter) {
		remove_secondary_carets();
		set_selection_mode(TextEdit::SelectionMode::SELECTION_MODE_LINE, p_line, 0);
		select(p_line, 0, p_line + 1, 0);
		set_caret_line(p_line + 1);
		set_caret_column(0);
		return;
	}
	if (p_gutter == fold_gutter) {
		if (is_line_folded(p_line)) {
			unfold_line(p_line);
		} else if (can_fold_line(p_line)) {
			fold_line(p_line);
		}
		return;
	}
}
void CodeEdit::_update_gutter_indexes() {