Has anyone experienced the following? :

z40-c-12z Fresh out of the box , diskparted, formatted, TPM ownership cleared in bios - builds fine via SCCM and enables bitlocker

My issue is same model when returned for rebuild , remove device from AD/SCCM perform the same steps as above but SCCM task sequence fails when initialising TPM / Bitlocker

TS is fine , gpo / perms fine

Any ideas as to cause of failure?