Comment # 27 on bug 1228929 from Felix Miata

(In reply to Martin Wilck from comment #25)
> if you install both a new kernel and some other
> package  that wants to rebuild the initrd at the same time, no initrd will
> be built at all.

Makes sense, except, I'm doing single transaction in each instance: rpm. All
installations here have this configuration:
# zypper ll | grep kern
25 | kernel-de*                | package | (any)      |
26 | kernel-lo*                | package | (any)      |
#

> So finally some clue ...

Yay!!!!!

Seems right this issue would have started roughly the same time as
SKIP_REGENERATE_INITRD_ALL was introduced on account of bug 1192014 last
spring.

Given how hard this is to reproduce, I'd expect it to take more than a month
for that new regenerate-initrd-posttrans to suggest this is fixed, trying to
prove something won't or can't happen, and assuming another
suse-module-tools-scriptlets update doesn't replace it before enough time
passes.