Comment 5 for bug 1379296

if the dash would not be in lifecycle management at all and you would have gotten your system in such a state, the kernel would just have randomly killed bits of your session instead of the dash.

it is wanted that in such cases the dash gets killed before i.e. ofono gets killed so that your session still stays functional.
imho the behavior is just fine, in case the sysem functions normal it should be the last of your UI apps that gets killed.
in case where not even that would free up enough memory you have a whole lot of bigger probs ... the bug here lies within the apps that consume all your ram where they should not.