New HP Elitebooks shutting down when on battery power

[nerwmougietheiv]

We're seeing an issue with new HP EliteBooks (Various models) running Windows 11 23H2, fully updated, in our enterprise environment.

Issue:

When the laptop is on battery power and the lid is closed, the system shuts down sometimes immediately upon being unplugged from a dock, sometimes hours later, but always well before the battery is dead, often between 80-95% battery remaining.

This behavior:

Does not occur when plugged in

Is not consistent or able to be replicated on demand

Our older EliteBooks (same OS) do not show this behavior. Just the newer models (various models) that we have been purchasing as replacements.

 What We've Tried:

Confirmed lid-close action in Power Options is set to Sleep

Verified system supports only Modern Standby (S0) via powercfg /a

Disabled HP Intelligent Hibernate in BIOS (this seemed to resolve the issue on many devices, but one device started having the issue again after about a week, and is now happening daily for that device) I checked to see if the Intelligent Hibernate had somehow been turned back on, but it was still off.

Disabled “Extended Idle Power States” and other power-saving BIOS options

Ran with admin rights:

powercfg /change standby-timeout-dc 0
powercfg /change hibernate-timeout-dc 0
powercfg /hibernate off

SleepStudy logs shows inaccurate and missing data. Sometimes the log shows a transition from active to shutdown with no exit or entry reasons given, there are time frames that are missing from the logs, and some transitions showed the exit reason from active to shutdown being the power button, despite the power button not being pressed.

Event Viewer shows unexpected shutdowns (Event ID 6008), with no user-initiated shutdown (1074) logged for each instance.

Notes:

The systems are imaged via SCCM

The issue returned after a recent round of Windows Updates, despite BIOS settings still being correct

Behavior is consistent across multiple units of the same model and different models. Though we have only purchased HP devices, however HP support did diagnostics and said this was not a device issue, and pointed us to Windows problems.

Any insight into how to prevent this forced shutdown while on battery with the lid closed in Modern Standby would be greatly appreciated. Let me know if further logs or dumps would help.