### 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_line_code_region_start(1));
		CHECK(code_edit->get_line(2).contains("line2"));
		CHECK(code_edit->is_line_code_region_end(3));
		
		code_edit->set_text("line1\nline2\nline3");
		code_edit->clear_comment_delimiters();
		code_edit->add_comment_delimiter("#", "");
		code_edit->create_code_region();
		CHECK(code_edit->get_text() == "line1\nline2\nline3");
		
		code_edit->set_text("line1\nline2\nline3");
		code_edit->clear_comment_delimiters();
		code_edit->add_comment_delimiter("#", "");
		code_edit->select(0, 0, 0, 4, 0);
		code_edit->add_caret(2, 5);
		code_edit->select(2, 0, 2, 5, 1);
		code_edit->create_code_region();
		CHECK(code_edit->get_text() == "#region New Code Region\nline1\n#endregion\nline2\n#region New Code Region\nline3\n#endregion");
		
		code_edit->set_text("test line1\ntest line2\ntest line3");
		code_edit->clear_comment_delimiters();
		code_edit->add_comment_delimiter("#", "");
		code_edit->select(0, 0, 1, 2, 0);
		code_edit->add_caret(1, 4);
		code_edit->select(1, 4, 2, 5, 1);
		code_edit->create_code_region();
		CHECK(code_edit->get_text() == "#region New Code Region\ntest line1\ntest line2\ntest line3\n#endregion");
		
		code_edit->set_text("//region region_name\nline2\n//endregion");
		code_edit->clear_comment_delimiters();