ISSUE: Precision 3591 always reboots right after cold start

Hi my new work laptop (Dell Precision 3591) always reboots once right after a cold start. Sometimes it reboots before I can login into Windows. Sometimes I open an application before it reboots (up to a minute after the windows login screen appears). After the reboot everything work fine. The same thing happens to the Laptop of a colleague of mine so it is not isolated to one machine (we are the only ones with this type of Laptop at work). IT suspected the Dell docking station we use at work and have tried to change 1 or 2 BIOS settings to no avail but after going into home office I noticed that it also happens without the docking station.

Please let me know what further information may be useful to help resolve this issue.

Many Thanks