WorkManager 2.1.0-alpha01
I know 2.1.0-alpha02 is out but I cannot test it as I CANNOT reproduce this issue on both alpha01 and 02.

Proguard mappings
------------------
androidx.work.impl.constraints.trackers.NetworkStateTracker -> zl
androidx.work.impl.constraints.trackers.ConstraintTracker -> yl
androidx.work.impl.constraints.controllers.ConstraintController -> pl
androidx.work.impl.constraints.WorkConstraintsTracker -> ml
androidx.work.impl.background.systemalarm.WorkTimer -> gl

Crash report from user
-----------------
APP_VERSION_NAME=228 armeabi-v7a
ANDROID_VERSION=5.0
BRAND=samsung
PHONE_MODEL=SM-N9005
PRODUCT=hltexx
USER_APP_START_DATE=2019-05-22T09:58:13.756+01:00
USER_CRASH_DATE=2019-05-22T19:21:59.888+01:00
STACK_TRACE=java.lang.RuntimeException: Error receiving broadcast Intent { act=android.net.conn.CONNECTIVITY_CHANGE flg=0x4000010 (has extras) } in zl$a@5eda151
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:933)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5938)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
Caused by: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@220005dc rejected from java.util.concurrent.ScheduledThreadPoolExecutor@ffebca8[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]
at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2011)
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:793)
at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:298)
at java.util.concurrent.ScheduledThreadPoolExecutor.schedule(ScheduledThreadPoolExecutor.java:503)
at java.util.concurrent.Executors$DelegatedScheduledExecutorService.schedule(Executors.java:644)
at gl.a(SourceFile:7)
at dl.b(SourceFile:5)
at ml.a(SourceFile:21)
at pl.b(SourceFile:3)
at pl.a(SourceFile:18)
at yl.a(SourceFile:17)
at zl$a.onReceive(SourceFile:4)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:923)
... 8 more

LOGCAT=--------- beginning of main
05-22 19:21:59.727 D/AndroidRuntime(11913): Shutting down VM
05-22 19:21:59.757 E/ACRA (11913): ACRA caught a RuntimeException for com.nll.asr
05-22 19:21:59.757 E/ACRA (11913): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.net.conn.CONNECTIVITY_CHANGE flg=0x4000010 (has extras) } in zl$a@5eda151
05-22 19:21:59.757 E/ACRA (11913): at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:933)
05-22 19:21:59.757 E/ACRA (11913): at android.os.Handler.handleCallback(Handler.java:739)
05-22 19:21:59.757 E/ACRA (11913): at android.os.Handler.dispatchMessage(Handler.java:95)
05-22 19:21:59.757 E/ACRA (11913): at android.os.Looper.loop(Looper.java:145)
05-22 19:21:59.757 E/ACRA (11913): at android.app.ActivityThread.main(ActivityThread.java:5938)
05-22 19:21:59.757 E/ACRA (11913): at java.lang.reflect.Method.invoke(Native Method)
05-22 19:21:59.757 E/ACRA (11913): at java.lang.reflect.Method.invoke(Method.java:372)
05-22 19:21:59.757 E/ACRA (11913): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
05-22 19:21:59.757 E/ACRA (11913): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
05-22 19:21:59.757 E/ACRA (11913): Caused by: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@220005dc rejected from java.util.concurrent.ScheduledThreadPoolExecutor@ffebca8[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]
05-22 19:21:59.757 E/ACRA (11913): at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2011)
05-22 19:21:59.757 E/ACRA (11913): at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:793)
05-22 19:21:59.757 E/ACRA (11913): at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:298)
05-22 19:21:59.757 E/ACRA (11913): at java.util.concurrent.ScheduledThreadPoolExecutor.schedule(ScheduledThreadPoolExecutor.java:503)
05-22 19:21:59.757 E/ACRA (11913): at java.util.concurrent.Executors$DelegatedScheduledExecutorService.schedule(Executors.java:644)
05-22 19:21:59.757 E/ACRA (11913): at gl.a(SourceFile:7)
05-22 19:21:59.757 E/ACRA (11913): at dl.b(SourceFile:5)
05-22 19:21:59.757 E/ACRA (11913): at ml.a(SourceFile:21)
05-22 19:21:59.757 E/ACRA (11913): at pl.b(SourceFile:3)
05-22 19:21:59.757 E/ACRA (11913): at pl.a(SourceFile:18)
05-22 19:21:59.757 E/ACRA (11913): at yl.a(SourceFile:17)
05-22 19:21:59.757 E/ACRA (11913): at zl$a.onReceive(SourceFile:4)
05-22 19:21:59.757 E/ACRA (11913): at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:923)
05-22 19:21:59.757 E/ACRA (11913): ... 8 more

REPORT_ID=a476ba1d-9c82-4b7a-90cd-5d91e77df69d
IS_SILENT=false