If you follow the discussion I linked when opening the bug as [3] you'll find more. But the TL;DR is that sgdisk/gdisk always (and still) write the labels/names byte-swapped on s390x (or probably in general big endian).
So I'd suggest to not revert the change, and instead wait for a fix to the write code-path that then should be applied. -- Christian Ehrhardt Staff Engineer, Ubuntu Server Canonical Ltd
