diff --git a/core/object/class_db.cpp b/core/object/class_db.cpp
index c594f4a9b49..8c54db3c2cf 100644
--- a/core/object/class_db.cpp
+++ b/core/object/class_db.cpp
@@ -165,8 +165,8 @@ ClassDB::APIType ClassDB::get_api_type(const StringName &p_class) {
 }
 
 uint32_t ClassDB::get_api_hash(APIType p_api) {
-	OBJTYPE_RLOCK;
 #ifdef DEBUG_METHODS_ENABLED
+	OBJTYPE_WLOCK;
 
 	if (api_hashes_cache.has(p_api)) {
 		return api_hashes_cache[p_api];
@@ -175,7 +175,9 @@ uint32_t ClassDB::get_api_hash(APIType p_api) {
 	uint64_t hash = hash_murmur3_one_64(HashMapHasherDefault::hash(VERSION_FULL_CONFIG));
 
 	List<StringName> class_list;
-	ClassDB::get_class_list(&class_list);
+	for (const KeyValue<StringName, ClassInfo> &E : classes) {
+		class_list.push_back(E.key);
+	}
 	// Must be alphabetically sorted for hash to compute.
 	class_list.sort_custom<StringName::AlphCompare>();
 
@@ -859,8 +861,8 @@ void ClassDB::get_enum_constants(const StringName &p_class, const StringName &p_
 }
 
 void ClassDB::set_method_error_return_values(const StringName &p_class, const StringName &p_method, const Vector<Error> &p_values) {
-	OBJTYPE_RLOCK;
 #ifdef DEBUG_METHODS_ENABLED
+	OBJTYPE_WLOCK;
 	ClassInfo *type = classes.getptr(p_class);
 
 	ERR_FAIL_NULL(type);
@@ -871,6 +873,7 @@ void ClassDB::set_method_error_return_values(const StringName &p_class, const St
 
 Vector<Error> ClassDB::get_method_error_return_values(const StringName &p_class, const StringName &p_method) {
 #ifdef DEBUG_METHODS_ENABLED
+	OBJTYPE_RLOCK;
 	ClassInfo *type = classes.getptr(p_class);
 
 	ERR_FAIL_NULL_V(type, Vector<Error>());
@@ -1415,6 +1418,8 @@ void ClassDB::_bind_compatibility(ClassInfo *type, MethodBind *p_method) {
 }
 
 void ClassDB::_bind_method_custom(const StringName &p_class, MethodBind *p_method, bool p_compatibility) {
+	OBJTYPE_WLOCK;
+
 	ClassInfo *type = classes.getptr(p_class);
 	if (!type) {
 		ERR_FAIL_MSG("Couldn't bind custom method '" + p_method->get_name() + "' for instance '" + p_class + "'.");
diff --git a/editor/create_dialog.cpp b/editor/create_dialog.cpp
index 0e025b44309..e37035f5ebc 100644
--- a/editor/create_dialog.cpp
+++ b/editor/create_dialog.cpp
@@ -309,8 +309,10 @@ void CreateDialog::_configure_search_option_item(TreeItem *r_item, const String
 		r_item->set_custom_color(0, search_options->get_theme_color(SNAME("disabled_font_color"), EditorStringName(Editor)));
 	}
 
-	bool is_deprecated = EditorHelp::get_doc_data()->class_list[p_type].is_deprecated;
-	bool is_experimental = EditorHelp::get_doc_data()->class_list[p_type].is_experimental;
+	HashMap<String, DocData::ClassDoc>::Iterator class_doc = EditorHelp::get_doc_data()->class_list.find(p_type);
+
+	bool is_deprecated = (class_doc && class_doc->value.is_deprecated);
+	bool is_experimental = (class_doc && class_doc->value.is_experimental);
 
 	if (is_deprecated) {
 		r_item->add_button(0, get_editor_theme_icon("StatusError"), 0, false, TTR("This class is marked as deprecated."));
@@ -330,7 +332,7 @@ void CreateDialog::_configure_search_option_item(TreeItem *r_item, const String
 		r_item->set_collapsed(should_collapse);
 	}
 
-	const String &description = DTR(EditorHelp::get_doc_data()->class_list[p_type].brief_description);
+	const String &description = DTR(class_doc ? class_doc->value.brief_description : "");
 	r_item->set_tooltip_text(0, description);
 
 	if (p_type_category == TypeCategory::OTHER_TYPE && !script_type) {
diff --git a/editor/editor_help.cpp b/editor/editor_help.cpp
index d6eadf3ab4f..0ab6e20b015 100644
--- a/editor/editor_help.cpp
+++ b/editor/editor_help.cpp
@@ -2360,36 +2360,38 @@ void EditorHelp::_add_text(const String &p_bbcode) {
 	_add_text_to_rt(p_bbcode, class_desc, this, edited_class);
 }
 
-Thread EditorHelp::thread;
+String EditorHelp::doc_version_hash;
+bool EditorHelp::doc_gen_first_attempt = true;
+bool EditorHelp::doc_gen_use_threads = true;
+Thread EditorHelp::gen_thread;
 
 void EditorHelp::_wait_for_thread() {
-	if (thread.is_started()) {
-		thread.wait_to_finish();
+	if (gen_thread.is_started()) {
+		gen_thread.wait_to_finish();
 	}
 }
 
+void EditorHelp::_compute_doc_version_hash() {
+	uint32_t version_hash = Engine::get_singleton()->get_version_info().hash();
+	doc_version_hash = vformat("%d/%d/%d/%s", version_hash, ClassDB::get_api_hash(ClassDB::API_CORE), ClassDB::get_api_hash(ClassDB::API_EDITOR), _doc_data_hash);
+}
+
 String EditorHelp::get_cache_full_path() {
 	return EditorPaths::get_singleton()->get_cache_dir().path_join("editor_doc_cache.res");
 }
 
-static bool first_attempt = true;
-
-static String _compute_doc_version_hash() {
-	uint32_t version_hash = Engine::get_singleton()->get_version_info().hash();
-	return vformat("%d/%d/%d/%s", version_hash, ClassDB::get_api_hash(ClassDB::API_CORE), ClassDB::get_api_hash(ClassDB::API_EDITOR), _doc_data_hash);
-}
-
 void EditorHelp::_load_doc_thread(void *p_udata) {
-	DEV_ASSERT(first_attempt);
+	DEV_ASSERT(doc_gen_first_attempt);
+
 	Ref<Resource> cache_res = ResourceLoader::load(get_cache_full_path());
-	if (cache_res.is_valid() && cache_res->get_meta("version_hash", "") == _compute_doc_version_hash()) {
+	if (cache_res.is_valid() && cache_res->get_meta("version_hash", "") == doc_version_hash) {
 		Array classes = cache_res->get_meta("classes", Array());
 		for (int i = 0; i < classes.size(); i++) {
 			doc->add_doc(DocData::ClassDoc::from_dict(classes[i]));
 		}
 	} else {
 		// We have to go back to the main thread to start from scratch.
-		first_attempt = false;
+		doc_gen_first_attempt = false;
 		callable_mp_static(&EditorHelp::generate_doc).bind(true).call_deferred();
 	}
 }
@@ -2401,7 +2403,7 @@ void EditorHelp::_gen_doc_thread(void *p_udata) {
 
 	Ref<Resource> cache_res;
 	cache_res.instantiate();
-	cache_res->set_meta("version_hash", _compute_doc_version_hash());
+	cache_res->set_meta("version_hash", doc_version_hash);
 	Array classes;
 	for (const KeyValue<String, DocData::ClassDoc> &E : doc->class_list) {
 		classes.push_back(DocData::ClassDoc::to_dict(E.value));
@@ -2413,8 +2415,6 @@ void EditorHelp::_gen_doc_thread(void *p_udata) {
 	}
 }
 
-static bool doc_gen_use_threads = true;
-
 void EditorHelp::generate_doc(bool p_use_cache) {
 	OS::get_singleton()->benchmark_begin_measure("EditorHelp::generate_doc");
 	if (doc_gen_use_threads) {
@@ -2422,15 +2422,19 @@ void EditorHelp::generate_doc(bool p_use_cache) {
 		_wait_for_thread();
 	}
 
-	DEV_ASSERT(first_attempt == (doc == nullptr));
+	DEV_ASSERT(doc_gen_first_attempt == (doc == nullptr));
 
 	if (!doc) {
 		doc = memnew(DocTools);
 	}
 
-	if (p_use_cache && first_attempt && FileAccess::exists(get_cache_full_path())) {
+	if (doc_version_hash.is_empty()) {
+		_compute_doc_version_hash();
+	}
+
+	if (p_use_cache && doc_gen_first_attempt && FileAccess::exists(get_cache_full_path())) {
 		if (doc_gen_use_threads) {
-			thread.start(_load_doc_thread, nullptr);
+			gen_thread.start(_load_doc_thread, nullptr);
 		} else {
 			_load_doc_thread(nullptr);
 		}
@@ -2441,7 +2445,7 @@ void EditorHelp::generate_doc(bool p_use_cache) {
 		doc->generate(true);
 
 		if (doc_gen_use_threads) {
-			thread.start(_gen_doc_thread, nullptr);
+			gen_thread.start(_gen_doc_thread, nullptr);
 		} else {
 			_gen_doc_thread(nullptr);
 		}
diff --git a/editor/editor_help.h b/editor/editor_help.h
index 0ca3942e0be..1f813f930c6 100644
--- a/editor/editor_help.h
+++ b/editor/editor_help.h
@@ -187,12 +187,15 @@ class EditorHelp : public VBoxContainer {
 	String _fix_constant(const String &p_constant) const;
 	void _toggle_scripts_pressed();
 
-	static Thread thread;
+	static String doc_version_hash;
+	static bool doc_gen_first_attempt;
+	static bool doc_gen_use_threads;
+	static Thread gen_thread;
 
 	static void _wait_for_thread();
 	static void _load_doc_thread(void *p_udata);
 	static void _gen_doc_thread(void *p_udata);
-	static void _generate_doc_first_step();
+	static void _compute_doc_version_hash();
 
 protected:
 	virtual void _update_theme_item_cache() override;
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index ffad8d7a43e..7b0bea81d7e 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -576,6 +576,10 @@ void EditorNode::update_preview_themes(int p_mode) {
 
 void EditorNode::_notification(int p_what) {
 	switch (p_what) {
+		case NOTIFICATION_POSTINITIALIZE: {
+			EditorHelp::generate_doc();
+		} break;
+
 		case NOTIFICATION_PROCESS: {
 			if (opening_prev && !confirmation->is_visible()) {
 				opening_prev = false;
@@ -6761,7 +6765,6 @@ EditorNode::EditorNode() {
 		DisplayServer::get_singleton()->cursor_set_custom_image(Ref<Resource>());
 	}
 
-	EditorHelp::generate_doc();
 	SceneState::set_disable_placeholders(true);
 	ResourceLoader::clear_translation_remaps(); // Using no remaps if in editor.
 	ResourceLoader::clear_path_remaps();
diff --git a/editor/scene_create_dialog.cpp b/editor/scene_create_dialog.cpp
index d6cb36013f3..60ad7e59683 100644
--- a/editor/scene_create_dialog.cpp
+++ b/editor/scene_create_dialog.cpp
@@ -47,7 +47,6 @@
 
 void SceneCreateDialog::_notification(int p_what) {
 	switch (p_what) {
-		case NOTIFICATION_ENTER_TREE:
 		case NOTIFICATION_THEME_CHANGED: {
 			select_node_button->set_icon(get_editor_theme_icon(SNAME("ClassList")));
 			node_type_2d->set_icon(get_editor_theme_icon(SNAME("Node2D")));
@@ -55,6 +54,10 @@ void SceneCreateDialog::_notification(int p_what) {
 			node_type_gui->set_icon(get_editor_theme_icon(SNAME("Control")));
 			node_type_other->add_theme_icon_override(SNAME("icon"), get_editor_theme_icon(SNAME("Node")));
 		} break;
+
+		case NOTIFICATION_READY: {
+			select_node_dialog->select_base();
+		} break;
 	}
 }
 
@@ -180,7 +183,6 @@ SceneCreateDialog::SceneCreateDialog() {
 	select_node_dialog = memnew(CreateDialog);
 	add_child(select_node_dialog);
 	select_node_dialog->set_base_type("Node");
-	select_node_dialog->select_base();
 	select_node_dialog->connect("create", callable_mp(this, &SceneCreateDialog::on_type_picked));
 
 	VBoxContainer *main_vb = memnew(VBoxContainer);