[ovirt-users] PXELinux BIOS reboot loop on Ubuntu 16.04

When I have build a successfull host using Foreman it gets the PXE Menu showed in the attachment. This menu with the first option selected gets into a reboot loop: Chanload into bootloader on the first disk When I manually switch to: Chanload into bootloader on the first disk - alternative the host boots as normal. Why does this happens just at once on Debian/Ubuntu and not on Fedora/CentOS ?