### 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
const int text_size = get_line_count();
	StringBuilder result;
	for (int i = 0; i < text_size; i++) {
		String line_text = get_line(i);
		if (i == p_line && p_column >= 0 && p_column <= line_text.size()) {
			result += line_text.substr(0, p_column);
			
			result += String::chr(0xFFFF);
			result += line_text.substr(p_column, line_text.size());
		} else {
			result += line_text;
		}
		if (i != text_size - 1) {
			result += "\n";
		}
	}
	return result.as_string();
}
void CodeEdit::set_symbol_lookup_word_as_valid(bool p_valid) {
	symbol_lookup_word = p_valid ? symbol_lookup_new_word : "";
	symbol_lookup_new_word = "";
	if (lookup_symbol_word != symbol_lookup_word) {
		_set_symbol_lookup_word(symbol_lookup_word);
	}
}
void CodeEdit::duplicate_lines() {