[Moto G5 Plus ROMs, Kernels, Recoveries, & Other De] cjdijk:
I have been searching in my (very large) stored logfile, and have found (when searching for Conscrypt) about same lines as you have:

07-20 07:40:19.756 10869 26757 W Conscrypt: Could not set socket write timeout: java.net.SocketException: Socket closed

07-20 07:40:19.757 10869 26757 W Conscrypt: at com.google.android.gms.org.conscrypt.Platform.setSocketWriteTimeout:)com.google.android.gms@222413037@22.24.13 (150400-455379205):2)

07-20 07:40:19.757 10869 26757 W Conscrypt: at com.google.android.gms.org.conscrypt.ConscryptFileDescriptorSocket.setSoWriteTimeout:)com.google.android.gms@222413037@22.24.13 (150400-455379205):0)

And directly after that Conscrypt some SystemUpdate messages:

07-20 07:40:19.759 10869 11011 I SystemUpdate: [Execution,ExecutionManager] Action pending executed for 0.01 seconds.

07-20 07:40:19.762 10869 11011 I SystemUpdate: [Execution,ExecutionManager] Action pre-download-validate executed for 0.00 seconds.

07-20 07:40:19.764 10869 11011 W SystemUpdate: [Execution,ExecutionManager] Unable to create the action. Restart the execution from the scratch.

07-20 07:40:19.764 10869 11011 W SystemUpdate: java.lang.IllegalStateException

07-20 07:40:19.764 10869 11011 W SystemUpdate: at wvs.k:)com.google.android.gms@222413037@22.24.13 (150400-455379205):0)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at blvg.f:)com.google.android.gms@222413037@22.24.13 (150400-455379205):0)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at bltz.a:)com.google.android.gms@222413037@22.24.13 (150400-455379205):10)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at com.google.android.gms.update.execution.InstallationIntentOperation.onHandleIntent:)com.google.android.gms@222413037@22.24.13 (150400-455379205):12)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at com.google.android.chimera.IntentOperation.onHandleIntent:)com.google.android.gms@222413037@22.24.13 (150400-455379205):2)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at uuo.onHandleIntent:)com.google.android.gms@222413037@22.24.13 (150400-455379205):4)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at fdd.run:)com.google.android.gms@222413037@22.24.13 (150400-455379205):3)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at fdc.run:)com.google.android.gms@222413037@22.24.13 (150400-455379205):11)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at cfbb.run:)com.google.android.gms@222413037@22.24.13 (150400-455379205):2)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)

07-20 07:40:19.764 10869 11011 W SystemUpdate: at java.lang.Thread.run(Thread.java:923)

But I don't think it's a problem. I have enabled mobile data all the time. This Moto G5 Plus is my daily main smartphone. It's powered on all the time. And have used 19.11MB in 2 weeks: 4.28MB Google play services, Outlook 2.97MB, Google 1.97MB, TomTom 1.91MB, Android system 1.62MB. Syle and background 1.09MB, Chrome 1.01MB, WhatsApp 879KB. And some other apps (which are using some KB's).

By the way, the update from 7.13 to 7.15 didn't work for me, it gave a bootloop, So I did download the zip file and a fresh install of 7.15 when it came out.