### 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
TypedArray<String> prefixes;
	for (const char32_t &E : code_completion_prefixes) {
		prefixes.push_back(String::chr(E));
	}
	return prefixes;
}
String CodeEdit::get_text_for_code_completion() const {
	StringBuilder completion_text;
	const int text_size = get_line_count();
	for (int i = 0; i < text_size; i++) {
		String line = get_line(i);
		if (i == get_caret_line()) {
			completion_text += line.substr(0, get_caret_column());
			
			completion_text += String::chr(0xFFFF);
			completion_text += line.substr(get_caret_column(), line.size());
		} else {
			completion_text += line;
		}
		if (i != text_size - 1) {
			completion_text += "\n";
		}
	}
	return completion_text.as_string();
}
void CodeEdit::request_code_completion(bool p_force) {