Android worker被取消，未显示原因

Work [ id=ab50e634-d315-4566-acc2-fe146a7366e2, tags={ in.offline.usecase.Upload****s$Worker, upload/***/now/* } ] was cancelled
java.util.concurrent.CancellationException: Task was cancelled.
    at androidx.work.impl.utils.futures.AbstractFuture.cancellationExceptionWithCause(AbstractFuture.java:1184)
    at androidx.work.impl.utils.futures.AbstractFuture.getDoneValue(AbstractFuture.java:514)
    at androidx.work.impl.utils.futures.AbstractFuture.get(AbstractFuture.java:475)
    at androidx.work.impl.WorkerWrapper$2.run(WorkerWrapper.java:284)
    at androidx.work.impl.utils.SerialExecutor$Task.run(SerialExecutor.java:91)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
    at java.lang.Thread.run(Thread.java:764)

为什么work manager开发人员无法说明取消的原因，这个问题现在大约有一年了，他们提供前台支持，但没有解决基本问题。