diff --git a/src/network/ws/wssocket.cpp b/src/network/ws/wssocket.cpp
index c0d74c622..e3f95fa03 100644
--- a/src/network/ws/wssocket.cpp
+++ b/src/network/ws/wssocket.cpp
@@ -223,7 +223,9 @@ void WSSocket::on_message(const websocketpp::connection_hdl &hdl, const message_
 	}
 
 	std::string s{msg->get_payload().data(), msg->get_payload().size()};
+#if !NDEBUG
 	cs << "A message: " << msg->get_payload().size() << " " << msg->get_payload() << '\n';
+#endif
 
 	incoming_queue.emplace_back(queue_item{a, std::move(s)});
 }
diff --git a/src/script/cpp_api/s_base.cpp b/src/script/cpp_api/s_base.cpp
index 724d43a60..f70657500 100644
--- a/src/script/cpp_api/s_base.cpp
+++ b/src/script/cpp_api/s_base.cpp
@@ -67,6 +67,7 @@ ScriptApiBase::ScriptApiBase(ScriptingType type):
 #ifdef SCRIPTAPI_LOCK_DEBUG
 	m_lock_recursion_count = 0;
 #endif
+
 	m_luastack = luaL_newstate();
 	FATAL_ERROR_IF(!m_luastack, "luaL_newstate() failed");
 
@@ -497,7 +498,7 @@ void ScriptApiBase::objectrefGetOrCreate(lua_State *L, ServerActiveObject *cobj)
 		errorstream << "ScriptApiBase::objectrefGetOrCreate(): "
 				<< "Pushing orphan ObjectRef. Please open a bug report for this."
 				<< std::endl;
-		assert(0);
+		//assert(0);
 		ObjectRef::create(L, cobj);
 	} else {
 		push_objectRef(L, cobj->getId());
diff --git a/src/script/cpp_api/s_entity.cpp b/src/script/cpp_api/s_entity.cpp
index f55a0b0a4..e593adeca 100644
--- a/src/script/cpp_api/s_entity.cpp
+++ b/src/script/cpp_api/s_entity.cpp
@@ -226,7 +226,7 @@ void ScriptApiEntity::luaentity_GetProperties(u16 id,
 bool ScriptApiEntity::luaentity_Step(u16 id, float dtime,
 	const collisionMoveResult *moveresult)
 {
-	TRY_SCRIPTAPI_PRECHECKHEADER({})
+	TRY_SCRIPTAPI_PRECHECKHEADER(true)
 
 	int error_handler = PUSH_ERROR_HANDLER(L);
 
diff --git a/src/server/activeobjectmgr.cpp b/src/server/activeobjectmgr.cpp
index 7ad14fc6e..3e84ec21f 100644
--- a/src/server/activeobjectmgr.cpp
+++ b/src/server/activeobjectmgr.cpp
@@ -177,6 +177,11 @@ void ActiveObjectMgr::removeObject(u16 id)
 
 void ActiveObjectMgr::invalidateActiveObjectObserverCaches()
 {
+	const auto lock = m_active_objects.try_lock_shared_rec();
+	if (!lock->owns_lock()) {
+		return;
+	}
+
 	for (auto &active_object : m_active_objects.iter()) {
 		ServerActiveObject *obj = active_object.second.get();
 		if (!obj)