It is not only a system bug ,but also it because of OpenUDID ,there is an artical explain this problem:https://mp.weixin.qq.com/s/W_AqP8cQy3d5QCMJ8Nzftwand there is an incomplete solution :https://juejin.im/post/5e2022a4f265da3dea3482e0Hope apple can solve this problem soon