Comment 88 for bug 1396379

This bug is not an Ubuntu installer problem or a Debian installer problem. It is 100% a Grub problem. Unbelievable it has gone on this long.

You can recreate this problem in other ways than the OS installers:
From an installed distro of your choice, simply create an ESP and a Linux partition on a thumb drive. Create the file systems and mount the partitions. Then debootstrap your distro to the thumb drive. Chroot into it, customize the hell out of it. Finally apt-get install the EFI version of grub, run grub-install (carefully using the switches to install to the ESP on the thumb drive). Exit the chroot. Although everything looks like it worked, it didn't. Remove the thumb drive, and if you reboot your host computer you created the thumb drive with you'll notice that your boot sector has been overwritten.