### 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
CHECK(code_edit->is_code_completion_enabled());
		
		TypedArray<String> completion_prefixes;
		completion_prefixes.push_back("");
		completion_prefixes.push_back(".");
		completion_prefixes.push_back(".");
		completion_prefixes.push_back(",,");
		ERR_PRINT_OFF;
		code_edit->set_code_completion_prefixes(completion_prefixes);
		ERR_PRINT_ON;
		completion_prefixes = code_edit->get_code_completion_prefixes();
		CHECK(completion_prefixes.size() == 2);
		CHECK(completion_prefixes.has("."));
		CHECK(completion_prefixes.has(","));
		code_edit->set_text("test\ntest");
		CHECK(code_edit->get_text_for_code_completion() == String::chr(0xFFFF) + "test\ntest");
	}
	SUBCASE("[CodeEdit] autocomplete request") {
		SIGNAL_WATCH(code_edit, "code_completion_requested");
		code_edit->set_code_completion_enabled(true);
		Array signal_args;
		signal_args.push_back(Array());
		
		code_edit->request_code_completion();
		SIGNAL_CHECK_FALSE("code_completion_requested");
		code_edit->request_code_completion(true);
		SIGNAL_CHECK("code_completion_requested", signal_args);
		
		SEND_GUI_ACTION("ui_text_completion_query");
		SIGNAL_CHECK("code_completion_requested", signal_args);