### Tested versions

- Reproducible in: 4.2.1 Stable
- Testing working functionality in: 4.2 Stable and 4.1 Stable

### System information

Windows 11 - Godot v4.2.1-stable - Vulkan (Forward+)

### Issue description

I have a timer as shown in the attached image. When I tried to drag the timer to the script and use the dot notation to autocomplete the in-built functions of the Timer class, I didn't get suggestions.

While in v4.1 opening the same project gave intellisense.
![image](https://github.com/godotengine/godot/assets/29101013/5e5088d9-8e61-4d4b-a5b4-8deb37cd915b)


### Steps to reproduce

1. Create a Timer
2. Drag and drop in the gdscript editor.
3. Try to invoke the start method.

### Minimal reproduction project (MRP)

[Test DnD.zip](https://github.com/godotengine/godot/files/13658039/Test.DnD.zip)

ScriptLanguage::CodeCompletionOption set("set", ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);
			options.insert(set.display, set);
			r_forced = true;
		} break;
		case GDScriptParser::COMPLETION_PROPERTY_METHOD: {
			if (!completion_context.current_class) {
				break;
			}
			for (int i = 0; i < completion_context.current_class->members.size(); i++) {
				const GDScriptParser::ClassNode::Member &member = completion_context.current_class->members[i];
				if (member.type != GDScriptParser::ClassNode::Member::FUNCTION) {
					continue;
				}
				if (member.function->is_static) {
					continue;
				}
				ScriptLanguage::CodeCompletionOption option(member.function->identifier->name, ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION);
				options.insert(option.display, option);
			}
			r_forced = true;
		} break;
		case GDScriptParser::COMPLETION_ASSIGN: {
			GDScriptCompletionIdentifier type;
			if (!completion_context.node || completion_context.node->type != GDScriptParser::Node::ASSIGNMENT) {
				break;
			}
			if (!_guess_expression_type(completion_context, static_cast<const GDScriptParser::AssignmentNode *>(completion_context.node)->assignee, type)) {
				_find_identifiers(completion_context, false, options, 0);
				r_forced = true;
				break;