小米，oppo手机退出后再登录报空，华为手机无问题

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React: Exception in native call from JS
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.facebook.react.uimanager.ReactShadowNode.setStyleWidth(float)' on a null object reference
at com.facebook.react.uimanager.UIImplementation.updateRootNodeSize(UIImplementation.java:136)
at com.facebook.react.uimanager.UIManagerModule.updateRootNodeSize(UIManagerModule.java:195)
at com.facebook.react.uimanager.UIManagerModule.access$000(UIManagerModule.java:62)
at com.facebook.react.uimanager.UIManagerModule$1$1.run(UIManagerModule.java:178)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:31)
at android.os.Looper.loop(Looper.java:135)
at com.facebook.react.bridge.queue.MessageQueueThreadImpl$3.run(MessageQueueThreadImpl.java:196)
at java.lang.Thread.run(Thread.java:818)

Start by reproducing the logout-and-login flow on Xiaomi and Oppo devices, comparing it with Huawei. Trace the failure through UIManagerModule.updateRootNodeSize and UIImplementation.updateRootNodeSize, where the reported null ReactShadowNode occurs. Done means the flow no longer raises this NullPointerException on the affected devices.

Written by the indexing model from the issue text.