Install fails but enhanced logging does not contain errors - vsto

Question

I have a ClickOnce Office Add-In that inconsistently fails to install in a PowerShell script. The script is being run from SCCM. When it fails, the only error in the install log is a -400 return value, which of course means almost nothing. There is other output both before and after that error, and nothing stands out.
I was able to replicate this once while ClickOnce logging was turned on, and the output is below (no timestamps because I had to transcribe this by hand).
Failed install:
PLATFORM VERSION INFO
Windows : 6.2.9200.0 (WinNT)
Common Language Runtime : 4.0.30319.42000
System.Deployment.dll : 4.7.2046.0 built by: NET47REL1
clr.dll : 4.7.3260.0 built by: NET472REL1LAST_C
dfdll.dll : 4.7.2046.0 built by: NET47REL1
dfshim.dll : 10.0.15063.0 (WinBuild.160101.0800)
SOURCES
Deployment url : file://path/to/my.vsto
ERROR SUMMARY
No errors were detected during this operation.
COMPONENT STORE TRANSACTION FAILURE SUMMARY
No transaction error was detected.
WARNINGS
There were no warnings during this operation.
OPERATION PROGRESS STATUS
No phase information is available.
ERROR DETAILS
No errors were detected during this operation.
COMPONENT STORE TRANSACTION DETAILS
No transaction information is available.
DETAILED EXECUTION FLOW
Activation through IPHM APIs is started.
Method Call : InPlaceHostingManager(file://path/to/my.vsto,False) called.
Method Call : InPlaceHostingManager.GetManifestAsync() called.
Internal state=GettingManifest
Method Call : DeploymentManager.BindAsync() called.
Binding started in a worker thread.
Internal state=DownloadingDeploymentInformation
Method Call : InPlaceHostingManager.Dispose() called.
Internal state=Done
Successful install:
PLATFORM VERSION INFO
Windows : 6.2.9200.0 (WinNT)
Common Language Runtime : 4.0.30319.42000
System.Deployment.dll : 4.7.2046.0 built by: NET47REL1
clr.dll : 4.7.3260.0 built by: NET472REL1LAST_C
dfdll.dll : 4.7.2046.0 built by: NET47REL1
dfshim.dll : 10.0.15063.0 (WinBuild.160101.0800)
SOURCES
Deployment url : file://path/to/my.vsto
Application url : file://path/to/my/Application Files/my_1_0_0_123/my.dll.manifest
IDENTITIES
Deployment Identity : my.vsto, Version=1.0.0.123, Culture=neutral, PublicKeyToken=<an alphnumeric value>, processorArchitecture=msil
Application Identity : my.dll, Version=1.0.0.123, Culture=neutral, PublicKeyToken=<an alphnumeric value>, processorArchitecture=msil, type=win32
APPLICATION SUMMARY
* Online only application
ERROR SUMMARY
No errors were detected during this operation.
COMPONENT STORE TRANSACTION FAILURE SUMMARY
No transaction error was detected.
WARNINGS
There were no warnings during this operation.
OPERATION PROGRESS STATUS
No phase information is available.
ERROR DETAILS
No errors were detected during this operation.
COMPONENT STORE TRANSACTION DETAILS
No transaction information is available.
DETAILED EXECUTION FLOW
Activation through IPHM APIs is started.
Method Call : InPlaceHostingManager(file://path/to/my.vsto,False) called.
Method Call : InPlaceHostingManager.GetManifestAsync() called.
Internal state=GettingManifest
Method Call : DeploymentManager.BindAsync() called.
Binding started in a worker thread.
Internal state=DownloadingDeploymentInformation
Method Call : InPlaceHostingManager.Dispose() called.
expectedAppId=file://path/to/my.vsto#my.vsto, Version=1.0.0.123, culture=neutral, PublicKeyToken=<an alphnumeric value>, processorArchitecture=msil/my.dll, Version=1.0.0.123, culture=neutral, PublicKeyToken=<an alphnumeric value>, processorArchitecture=msil, type=win32
Application is not found in store.
Internal state=DownloadingApplicationInformation
_cached=False
_isUpdate=False
Binding is successful.
Creating GetManifestCompletedEventArgs.
Application Identity=file://path/to/my.vsto, Version=1.0.0.123, culture=neutral, PublicKeyToken=<an alphnumeric value>, processorArchitecture=msil/my.dll, Version=1.0.0.123, culture=neutral, PublicKeyToken=<an alphnumeric value>, processorArchitecture=msil, type=win32
IsCached=False
Method Call : InPlaceHostingManager.DownloadApplicationAsync() called.
Internal state=DownloadingApplcication
Method Call : DeploymentManager.SynchronizeAsync() called.
Download and install of the application started ina worker thread.
Application is not cached.
Application is successfully committed to the store.
Refreshing ActivationContext from store.
Installation is successful.
Internal state=Done
Method Call : InPlaceHostingManager.Dispose() called.
Internal state=Done
Note that there are no actual errors in the failed install.
When I do see this, it does not re-occur a second time. How do I troubleshoot this further?