Firmware of qa-power8-4-kvm.qa.suse.de as shown by the MBC: Device Information Firmware Revision: 2.16.65371 Firmware Build Time: Jun 13 2019 11:15:14 CDT BIOS Version: 1.12.96 --- Firmware of qa-power8-5-kvm.qa.suse.de as shown by the MBC (no BIOS Version shown here at all): Device Information Firmware Revision: 2.13.91819 Firmware Build Time: Mar 10 2016 10:59:31 CDT --- So the problematic worker runs on newer firmware. Do you think that could make the difference?