Error Sending non-protected broadcast com.symbol.button.R1

Hello, I'm new on developing app for Zebra.
I'm developing an app for MC3300 Android noutgat.

I have installed correctly EMDK (API 26) and the app works, I can scan my QRcode, but I've noticed that when I try to scan I receive this error:

E/ActivityManager: Sending non-protected broadcast com.symbol.button.R1 from system 1125:system/1000 pkg android

    java.lang.Throwable

        at com.android.server.am.ActivityManagerService.checkBroadcastFromSystem(ActivityManagerService.java:18150)

        at com.android.server.am.ActivityManagerService.broadcastIntentLocked(ActivityManagerService.java:18728)

        at com.android.server.am.ActivityManagerService.broadcastIntent(ActivityManagerService.java:18819)

        at android.app.ContextImpl.sendBroadcastAsUser(ContextImpl.java:1040)

        at com.android.server.RemoteKeyEventService.broadcastPublicKeyIntent(RemoteKeyEventService.java:672)

        at com.android.server.RemoteKeyEventService.handleKeyEvent(RemoteKeyEventService.java:526)

        at com.android.server.wm.InputMonitor.interceptKeyBeforeQueueing(InputMonitor.java:464)

        at com.android.server.input.InputManagerService.interceptKeyBeforeQueueing(InputManagerService.java:1874)

If it is possible, How can I fix this error?