Websocket 账户信息请求提示异常，后续又自动正常，找不到原因

中文Websocket
1

账户信息流连接： wss://fstream.binance.com/ws/listenKey，连接之后，发送请求：{
“method”: “REQUEST”,
“params”:
[
“listenKey@account”,
“listenKey@balance”
],
“id”: 12 // request ID.
} ，经常性的提示 {
code: 2,
msg: ‘Invalid request: unknown variant REQUEST, expected one of SUBSCRIBE, UNSUBSCRIBE, LIST_SUBSCRIPTIONS, SET_PROPERTY, GET_PROPERTY’
}，但后续重连几次又正常