Find app causing: Sending non-protected broadcast android.intent.action.SU_SESSION_CHANGED from system

Question

I'm trying to find out what is responsible for constantly causing the following messages to be printed to logcat.

10-08 11:28:30.919  5258  5273 E ActivityManager: Sending non-protected broadcast android.intent.action.SU_SESSION_CHANGED from system 5258:system/1000 pkg android
10-08 11:28:30.919  5258  5273 E ActivityManager: java.lang.Throwable
10-08 11:28:30.919  5258  5273 E ActivityManager:       at com.android.server.am.ActivityManagerService.checkBroadcastFromSystem(ActivityManagerService.java:19162)
10-08 11:28:30.919  5258  5273 E ActivityManager:       at com.android.server.am.ActivityManagerService.broadcastIntentLocked(ActivityManagerService.java:19767)
10-08 11:28:30.919  5258  5273 E ActivityManager:       at com.android.server.am.ActivityManagerService.broadcastIntent(ActivityManagerService.java:19909)
10-08 11:28:30.919  5258  5273 E ActivityManager:       at android.app.ContextImpl.sendBroadcastAsUser(ContextImpl.java:1130)
10-08 11:28:30.919  5258  5273 E ActivityManager:       at com.android.server.AppOpsService$2.run(AppOpsService.java:142)
10-08 11:28:30.919  5258  5273 E ActivityManager:       at android.os.Handler.handleCallback(Handler.java:790)
10-08 11:28:30.919  5258  5273 E ActivityManager:       at android.os.Handler.dispatchMessage(Handler.java:99)
10-08 11:28:30.919  5258  5273 E ActivityManager:       at android.os.Looper.loop(Looper.java:164)
10-08 11:28:30.919  5258  5273 E ActivityManager:       at android.os.HandlerThread.run(HandlerThread.java:65)
10-08 11:28:30.919  5258  5273 E ActivityManager:       at com.android.server.ServiceThread.run(ServiceThread.java:46)

PID 5258 is "system_server".

How can I do this?

I'm running Lineage OS 15.1 / Android 8.1.