### Godot version

4.2 rc2

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description


https://github.com/godotengine/godot/assets/2223172/2c1829fa-1dd7-4f5b-b04a-f557ace35b5e

You can either see autocompletion or argument list. It's especially annoying when using e.g. `Input.get_vector()` method which has multiple arguments difficult to remember.

### Steps to reproduce

1. Write `Input.get_vector(`
2. Remove `(`
3. Add `(`

### Minimal reproduction project

N/A
code_region_start_string = "";
	code_region_end_string = "";
	if (code_region_start_tag.is_empty() || code_region_end_tag.is_empty()) {
		return;
	}
	
	for (int i = delimiters.size() - 1; i >= 0; i--) {
		if (delimiters[i].type != DelimiterType::TYPE_COMMENT) {
			continue;
		}
		if (delimiters[i].end_key.is_empty() && delimiters[i].line_only == true) {
			code_region_start_string = delimiters[i].start_key + code_region_start_tag;
			code_region_end_string = delimiters[i].start_key + code_region_end_tag;
			return;
		}
	}
}
void CodeEdit::_update_delimiter_cache(int p_from_line, int p_to_line) {
	if (delimiters.size() == 0) {
		return;
	}
	int line_count = get_line_count();
	if (p_to_line == -1) {
		p_to_line = line_count;
	}
	int start_line = MIN(p_from_line, p_to_line);
	int end_line = MAX(p_from_line, p_to_line);
	
	if (start_line != end_line) {