iOS: Scheduled DDM Update forces device to update immediately

[obi-k]

Wondering if anyone is experiencing this lately...

When we schedule a DDM update, the device successfully gets the command from Jamf Pro. The device downloads the update, but it immediately installs the update without honoring the scheduled plan. 

There isn't a notification, maybe a 5-second ticker, then the device shuts off and updates.

Some other details:

• Happens to some devices, not all

• I set the deadline a few days out

• Noticed this around iOS 18.1 - 18.2.1

• Here is a log from sysdisagnose:

[DDM] -[SUDDMManager _scanForUpdateForDeclaration:retryIfNecessary:]: Scanning for update for DDM declaration SUCoreDDMDeclaration (DeclarationKey:com.apple.RemoteManagement.SoftwareUpdateExtension/EAD2FADB-1141-44C4-8E49-6E07F462A033:NmQ1ZjVjYTItMzViNS00ZDcxLThkMWQtNGMxZmY3YmJlODYx.NjZmYTA2YzYyZGJjNjFmNzM0OGE1ZGY1YTNhMGU3ODg4ZWQwMjRjNDg5NTcwZDZmZDM4YWQ2M2VjNjc3ZWVkYQ==|EnforcedInstallDate:2025-01-08T22:00:00|VersionString:18.2.1|BuildVersionString:22C161|DetailsURL:(null)|companyName:(null)|NotificationsEnabled:YES)

[obi-k]

Also, here's the other part in sysdiagnose log that downloads and installs right away:

Scan found preferred descriptor {iOS 18.2.1} and alternate descriptor {(null)} with error (null) for scan options ClientName: com.apple.SoftwareUpdateServices.DDM Identifier: com.apple.SoftwareUpdateServices.DDM Forced: YES ScanType: 2 Types: Requested PMV: 18.2.1 Requested Build: 22C161 SessionID: 7091B1D1-49EE-4010-8404-3AB2ABA421DE MDM use delay: NO MDM show RSR: YES =============== MDM: RequestedProductMarketingVersion: 18.2.1 RequestedBuildVersion: 22C161 UseDelayPeriod: NO DelayPeriodSeconds: 0 MDMSoftwareUpdatePath: SUMDMSoftwareUpdatePathDefault AllowSplat: YES =================== Ignore NoUpdateFound response: NO