### Godot version

v4.0.beta.custom_build [0abd60b95]

### System information

Windows 10, Vulkan

### Issue description

Autocomplete doesn't work when trying to access a scene node that isn't a direct child of the scene root script, using $NodePath (Shorthand for get_node("NodePath") as per docs).

Example:
![image](https://user-images.githubusercontent.com/115422160/212197922-10e73c9f-de10-475e-ac6e-4163fc5b8013.png)

It worked in Godot 3.5:
![3.5](https://user-images.githubusercontent.com/115422160/212197992-61b67a42-86c6-4650-bab4-c7dfa5a67975.PNG)

I should mention that it works if you start by typing the name of a direct child:
![image](https://user-images.githubusercontent.com/115422160/212198641-6d8e6fca-a2d2-47a7-b627-2df95268daf5.png)

But when you have many nodes in the scene and longer names it's a pain to access the last children like that.


### Steps to reproduce

See above or MRP.

### Minimal reproduction project

[autocomplete bug.zip](https://github.com/godotengine/godot/files/10406695/autocomplete.bug.zip)

if (p_to_line < p_from_line) {
			for (int i = end_line; i > start_line; i--) {
				delimiter_cache.remove_at(i);
			}
		} else {
			for (int i = start_line; i < end_line; i++) {
				delimiter_cache.insert(i, RBMap<int, int>());
			}
		}
	}
	int in_region = -1;
	for (int i = start_line; i < MIN(end_line + 1, line_count); i++) {
		int current_end_region = (i <= 0 || delimiter_cache[i].size() < 1) ? -1 : delimiter_cache[i].back()->value();
		in_region = (i <= 0 || delimiter_cache[i - 1].size() < 1) ? -1 : delimiter_cache[i - 1].back()->value();
		const String &str = get_line(i);
		const int line_length = str.length();
		delimiter_cache.write[i].clear();
		if (str.length() == 0) {
			if (in_region != -1) {
				delimiter_cache.write[i][0] = in_region;
			}
			if (i == end_line && current_end_region != in_region) {
				end_line++;
				end_line = MIN(end_line, line_count);
			}
			continue;
		}
		int end_region = -1;
		for (int j = 0; j < line_length; j++) {
			int from = j;