PC powers off after DRIPS warning

This started to happen about 10 days ago, on most days, but not all.
My PC, a Dell XPS 8960, running Windows 11, shutdowns on its own while in suspension.
To resume working, I just need to press he power button to turn it back on.

Looking at event viewer, at the time of the power on, I see the error:

The system shutdown at xx:xx:xx on xx/xx/xx was unexpected

Previous to the shutdown I see these warnings:

USB device draining system power when system is idle.
USB Device: VID: 0x424 PID: 0x7260 REV: 0x625
Removal action failed: QueryRemovalInitiated

And another identical for VID: 0x424 PID: 0x7240 REV: 0x207

Then come another 2, one for each of these two devices, saying:
Enumerating a DRIPS blocking device that was previously removed when exiting low power epoch.
IsPortCycle: false

The devices under device manager with these IDs are both listed as USB2 Controller Hub:
USB\VID_0424&PID_7260&REV_0625&MI_00
USB\VID_0424&PID_7240&REV_0207

Which are both related to my Dell U3223QE Monitor.
If I unplug the USB-C cable from the monitor to the PC, both USB2 Controller Hub disappear from Device Manager.

So, clearly, the PC shutting down on its own when it goes into suspension has something to do with these warnings.

Since there are more USB devices connected to the monitor: a Dell soundbar AC511M, a fingerprint reader, a Logitech mouse USB wireless transmitter and a Yubikey physical security key (identity device), I can't be sure if the error is related to the monitor itself or one of the connected devices.
The monitor only has a 2022 driver published by Dell and that is the one installed. The soundbar has no driver from Dell and runs on a Microsoft 2024 driver. The mouse is running a 2006 Microsoft driver. The Yubikey is also on a Microsoft 2006 driver. Same for the fingerprint reader, listed as HID-compliant fido.
So no recent driver changes to any of them.

At this point, I don't know why it shutdowns or how to fix it.
Any help would be appreciated.