### 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
if (get_selection_to_column(c) == 0) {
				selection_offset = 0;
				end_line--;
			}
		}
		for (int i = start_line; i <= end_line; i++) {
			const String line_text = get_line(i);
			if (line_text.size() == 0 && has_selection(c)) {
				continue;
			}
			if (!indent_using_spaces) {
				set_line(i, '\t' + line_text);
				continue;
			}
			
			
			int spaces_to_add = _calculate_spaces_till_next_right_indent(get_first_non_whitespace_column(i));
			set_line(i, String(" ").repeat(spaces_to_add) + line_text);
			selection_offset = spaces_to_add;
		}
		
		if (has_selection(c)) {
			select(start_line, get_selection_from_column(c) + selection_offset, get_selection_to_line(c), get_selection_to_column(c) + selection_offset, c);
		}
		set_caret_column(get_caret_column(c) + selection_offset, false, c);
	}
	end_complex_operation();
	queue_redraw();
}
void CodeEdit::unindent_lines() {