Windows 10 laptop no longer hibernating when turning back on after transporting

Question

My HP ProBook 430 (SSD-only, 8GB RAM) is running Win10 v1903 [b10.0.18362.900], and when I turn it back on after hibernation, it's no longer hibernating, with all open windows gone.

• This occurs sporadically when transporting the laptop, which is within a pouch (thin foam between screen and keyboard), and I'm fairly certain it's never happened when not transporting the laptop

How can I determine the cause of my laptop losing hibernation?

• powercfg -devicequery s4_supported

  Broadcom BCM943228HMB 802.11abgn 2x2 Wi-Fi Adapter
  Motherboard resources
  Motherboard resources (001)
  USB Root Hub
  Microsoft ACPI-Compliant Embedded Controller
  System CMOS/real time clock
  Microsoft ACPI-Compliant Control Method Battery
  Root Print Queue
  ACPI Thermal Zone
  Programmable interrupt controller
  Volume Manager
  Microsoft Wi-Fi Direct Virtual Adapter
  Microsoft Wi-Fi Direct Virtual Adapter #2
  High Definition Audio Controller
  Fax
  WAN Miniport (PPPOE)
  Pci Bus
  PCI standard host CPU bridge
  Microsoft Basic Display Driver
  Realtek High Definition Audio
  HP Wireless Button Driver
  ACPI Sleep Button
  Extended IO Bus
  Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz
  Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz (001)
  Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz (002)
  Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz (003)
  VirtualBox Host-Only Ethernet Adapter
  Direct memory access controller
  Microsoft Windows Management Interface for ACPI
  Intel(R) 8 Series LPC Controller (Premium SKU) - 9C43
  Standard PS/2 Keyboard
  WAN Miniport (PPTP)
  Broadcom Bluetooth 4.0 Adapter
  Microsoft Hyper-V Virtualization Infrastructure Driver
  High precision event timer
  WAN Miniport (IKEv2)
  Composite Bus Enumerator
  Microsoft Virtual Drive Enumerator
  Microsoft AC Adapter
  Microsoft Storage Spaces Controller
  USB Root Hub (USB 3.0)
  Microsoft Kernel Debug Network Adapter
  ACPI Lid
  ACPI Thermal Zone (001)
  UMBus Root Bus Enumerator
  Charge Arbitration Driver
  ACPI Thermal Zone (002)
  ACPI x64-based PC
  HID-compliant wireless radio controls
  WAN Miniport (Network Monitor)
  WAN Miniport (IP)
  Legacy device
  Trusted Platform Module 1.2
  Realtek PCIe GBE Family Controller
  マイク (Realtek High Definition Audio)
  Microsoft ACPI-Compliant System
  Microsoft Basic Render Driver
  OneNote for Windows 10
  WAN Miniport (SSTP)
  ACPI Fixed Feature Button
  System timer
  Intel(R) 8 Series PCI Express Root Port #4 - 9C16
  Generic USB Hub
  Intel(R) HD Graphics Family
  Microsoft Print to PDF
  Intel(R) USB 3.0 eXtensible Host Controller - 1.0 (Microsoft)
  Standard SATA AHCI Controller
  Intel(R) Smart Connect Technology Device
  ACPI Thermal Zone (003)
  Synaptics PS/2 Port TouchPad
  Realtek PCIE CardReader
  Generic PnP Monitor
  Intel(R) 8 Series PCI Express Root Port #3 - 9C14
  ACPI Thermal Zone (004)
  Intel(R) 8 Series USB Enhanced Host Controller #1 - 9C26
  NDIS Virtual Network Adapter Enumerator
  Intel(R) Management Engine Interface
  SAMSUNG MZ7PD256HAFV-000H7
  ACPI Thermal Zone (005)
  Intel(R) 8 Series PCI Express Root Port #2 - 9C12
  Intel(R) 8 Series Thermal - 9C24
  Microsoft System Management BIOS Driver
  Motherboard resources (002)
  Microsoft XPS Document Writer
  Speakers/Headphones (Realtek High Definition Audio)
  Plug and Play Software Device Enumerator
  Remote Desktop Device Redirector Bus
  WAN Miniport (IPv6)
  Intel(R) 8 Series PCI Express Root Port #1 - 9C10
  HP Mobile Data Protection Sensor
  WAN Miniport (L2TP)
  

• powercfg -waketimers:

  Timer set by [SERVICE] \Device\HarddiskVolume3\Windows\System32\svchost.exe (SystemEventsBroker) expires at 12:26:30 AM on 16/06/2020.
    Reason: Windows will execute 'NT TASK\Microsoft\Windows\UpdateOrchestrator\Universal Orchestrator Start' scheduled task that requested waking the computer.
  Timer set by [PROCESS] \Device\HarddiskVolume3\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe expires at 12:26:30 AM on 16/06/2020.
  

• powercfg /availablesleepstates:

  The following sleep states are available on this system:
      Standby (S3)
      Hibernate
      Hybrid Sleep
      Fast Startup
  The following sleep states are not available on this system:
      Standby (S1)
          The system firmware does not support this standby state.
  Standby (S2)
      The system firmware does not support this standby state.
  
  Standby (S0 Low Power Idle)
      The system firmware does not support this standby state.