@Pavel yannara Mirochnitchenko Based on my experience, there is a delay time in intune getting the installation status. If turn off the device or disconnect the network during this time, I think it will affect the installation status time reported to intune.
If you deploy this app as a win32 app, you can check the IntuneManagementExtension.log to get the detailed time about every steps.
https://learn.microsoft.com/en-us/troubleshoot/mem/intune/develop-deliver-working-win32-app-via-intune#detailed-flow-in-ime-logs
Thanks for your sharing about this observation.
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