### 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
ERR_FAIL_INDEX(p_line, get_line_count());
	if (!is_line_folded(p_line) && !_is_line_hidden(p_line)) {
		return;
	}
	int fold_start = p_line;
	for (; fold_start > 0; fold_start--) {
		if (is_line_folded(fold_start)) {
			break;
		}
	}
	fold_start = is_line_folded(fold_start) ? fold_start : p_line;
	for (int i = fold_start + 1; i < get_line_count(); i++) {
		if (!_is_line_hidden(i)) {
			break;
		}
		_set_line_as_hidden(i, false);
		if (is_line_code_region_start(i - 1)) {
			set_line_background_color(i - 1, Color(0.0, 0.0, 0.0, 0.0));
		}
	}
	queue_redraw();
}
void CodeEdit::fold_all_lines() {