1709 servicing doesn't restart

[Phred]

Hello all -

I'm trying out Windows 10 Servicing and on a 1607 machine, I can see the upgrade deployment and it downloads properly but then hangs after that at installing. 

UpdateDeployment.log

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Update (Site_6486F88A-6CE4-45F7-865B-FB7832923564/SUM_2c038450-6726-4512-bd3b-a00f3bb0f865) Progress: Status = ciStateInstalling, PercentComplete = 100, DownloadSize = 0, Result = 0x0 UpdatesDeploymentAgent 11/3/2017 11:58:16 AM 3212 (0x0C8C)

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UpdatesHandler.log

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Initiating Scan. Forced = (0) UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
Successfully initiated scan for job ({20EC2A1E-4A8D-4C19-8F7B-BDEDDC616167}). UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
MTC task with id {B67FA1A2-40A2-4C07-885E-2546F2B45F0B}, changed state from 4 to 5 UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
No change in the handle state. Ignoring. UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
Scan completion received for job ({20EC2A1E-4A8D-4C19-8F7B-BDEDDC616167}). UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
Evaluating status of the updates for the job ({20EC2A1E-4A8D-4C19-8F7B-BDEDDC616167}). UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
CDeploymentJob::InstallUpdatesInBatch - Batch or non-batch install is not in progress for the job ({20EC2A1E-4A8D-4C19-8F7B-BDEDDC616167}). So allowing install.. UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
Update (2c038450-6726-4512-bd3b-a00f3bb0f865) not added to the install batch as it might be an exclusive update or NonWSUS update UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
CDeploymentJob::InstallUpdatesInBatch - Resetting install flag to false as method is complete UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
CDeploymentJob::ExecuteUpdates - Batch or non-batch install is not in progress for the job ({20EC2A1E-4A8D-4C19-8F7B-BDEDDC616167}). So allowing install.. UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
Executing the updates for the job ({20EC2A1E-4A8D-4C19-8F7B-BDEDDC616167}). UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
Starting or resuming update (2c038450-6726-4512-bd3b-a00f3bb0f865). UpdatesHandler 11/3/2017 11:57:42 AM 2732 (0x0AAC)
CDeploymentJob::ExecuteUpdates - Resetting install flag to false as method is complete UpdatesHandler 11/3/2017 11:57:45 AM 2732 (0x0AAC)

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The UpdateDeployment log says it installed OK and 1 time out of 4 it does work, but most of the time I manually reboot and nothing happens. One of my test machines says the upgrade was successfully installed.

I can see that Modern Setup Host and Windows 10 Setup are running in Task Manager, but nothing happens.

So my clients never restart on their own or ask for a restart and even when I do most of the time nothing happens.