Comment # 2 on bug 1089732 from Aleksa Sarai

(In reply to Aleksa Sarai from comment #1)
> This may be related to a recent change where the AppArmor profile was
> updated to fix a kernel regression (signals would not be sent properly). Can
> you check if building a package without
> bsc1073877-0001-apparmor-allow-receiving-of-signals-from-docker-kill.patch
> fixes the issue?

In particular it looks like old SLE versions cannot handle

> signal (receive) peer=unconfined,

(though I haven't tested this myself).