我已经多次看到 UIAutomator 出现这个问题.尝试转到其他屏幕，获取该屏幕的元素，然后再次返回该屏幕.尝试再次获取元素并且应该可以工作.

I have seen this problem with UIAutomator so many times. Try going to some other screen, fetch the elements of that screen and then come back to this screen again. Try to fetch the elements again and should work.