Comment # 53 on bug 968405 from Egbert Eich

(In reply to Dominique Leuenberger from comment #50)
>  %_restart_check_systemctl								\
> -	test "$DISABLE_RESTART_ON_UPDATE" = yes && exit 0				\
> +	test "$DISABLE_RESTART_ON_UPDATE" != no && exit 0				\
> 
> But as /etc/sysconfig/service is not yet sourced at that moment, ANY package
> not specifying it =no will NOT restart now (their value of
> DISABLE+RESTART_ON_UPDATE is "", not 'no'

Exactly. I did propose a patch in comment #33 which sources
/etc/sysconfig/service but so far this has been ignored completely.