store.aget It's deadlocked？？？？

[tianshangwuyun]

I built a graph using asynccontextmanager and AsyncConnection.connect, version 2.0.6
Then retrieve data through store.aget. When executed before a certain await, is deadlock. However, if executed after await, such as after calling LLM's ainvoke, there is no problem. I can build the graph using pool without any problem
CustomPgMemorySaver only extend AsyncPostgresSaver

class CustomPgMemorySaver(AsyncPostgresSaver)：
pass

@asynccontextmanager
    async def compile_graph(self):
        connection_kwargs = {
            "autocommit": True,
            "prepare_threshold": 0,
            "row_factory": dict_row,
        }
        async with await AsyncConnection.connect(DB_URI, **connection_kwargs) as conn:
                store = AsyncPostgresStore(conn)
                await store.setup()
                memory = CustomPgMemorySaver(conn)
                await memory.setup()
                yield self.app.compile(checkpointer=memory, store=store)

one_node of Graph, this node is async：

memories = await search_memory_str(
                old_task_id,
                node_code=state.get("node_code", None),
                store=store,
                config=config,
            )
 ... await llm.ainvoke(.......)

it is call store.aget ,and then deadlock,
but

 ... await llm.ainvoke(.......)    or await asyncio.sleep(1)    
 memories = await search_memory_str(
               old_task_id,
               node_code=state.get("node_code", None),
               store=store,
               config=config,
           )

has no problem

i change to pool also no problem

async with AsyncConnectionPool(
                            conninfo=DB_URI,
                            max_size=20,
                            kwargs=connection_kwargs,
                        ) as pool:
                store = AsyncPostgresStore(pool)
                await store.setup()
                memory = CustomPgMemorySaver(pool)
                await memory.setup()
                yield self.app.compile(checkpointer=memory, store=store)        
                
                ```
I don't know why?