jscode2session 频繁报错 40029

https://api.weixin.qq.com/sns/jscode2session 接口时好时坏，频繁报错 40029

{“errcode”:40029,“errmsg”:“invalid code, hints: [ req_id: xp1K.A0235th42 ]”}

{“errcode”:40029,“errmsg”:“invalid code, hints: [ req_id: GakEJa0242th36 ]”}

{“errcode”:40029,“errmsg”:“invalid code, hints: [ req_id: 5qNKua0252th36 ]”}

{“errcode”:40029,“errmsg”:“invalid code, hints: [ req_id: u62AlA0295th36 ]”}

{“errcode”:40029,“errmsg”:“invalid code, hints: [ req_id: 9gL8rA0301th27 ]”}

{“errcode”:40029,“errmsg”:“invalid code, hints: [ req_id: d_iIua0307th21 ]”}

{“errcode”:40029,“errmsg”:“invalid code, hints: [ req_id: _mNIwa0315th36 ]”}