New Latitude 5540 - reboots automatically after shutdown

Hi All,

we received 8 brand new Dell Latitude 5540 laptops for our company this week. Our image was installed on them (Win11 OS - Enterprise with Direct access VPN), which was already tested on previous Dell notebooks and without issues, but on the new devices we have the following problem - when the device is connected via AC adapter and we trigger the shut down (via standard option in Win11), it first looks like it will go through and the screen and keyboard light turn off but cca. after 10 seconds it restarts again and we end up on the login screen. This doesnt happen when the devices are not connected via AC adapter.

We have tryed the following TS:

1. Update BIOS - from version 1.9.0 to 1.12.0

2. Installed all updates from the DELL website for the specific devices

3. In BIOS, turned of the USB wake support

Thank you in advance for any information and help which could solve this for us.