### 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
return code_region_start_tag;
}
String CodeEdit::get_code_region_end_tag() const {
	return code_region_end_tag;
}
void CodeEdit::set_code_region_tags(const String &p_start, const String &p_end) {
	ERR_FAIL_COND_MSG(p_start == p_end, "Starting and ending region tags cannot be identical.");
	ERR_FAIL_COND_MSG(p_start.is_empty(), "Starting region tag cannot be empty.");
	ERR_FAIL_COND_MSG(p_end.is_empty(), "Ending region tag cannot be empty.");
	code_region_start_tag = p_start;
	code_region_end_tag = p_end;
	_update_code_region_tags();
}
bool CodeEdit::is_line_code_region_start(int p_line) const {
	ERR_FAIL_INDEX_V(p_line, get_line_count(), false);
	if (code_region_start_string.is_empty()) {
		return false;
	}
	return get_line(p_line).strip_edges().begins_with(code_region_start_string);
}
bool CodeEdit::is_line_code_region_end(int p_line) const {