Comment # 10 on bug 966255 from Robert Schweikert

I did spend some time looking at the log and while I do not find any evidence
of a crash as indicated by Paul, see comment #7, I do think it is a matter of
plymouth just not displaying the request for the passphrase.

>From the log:

Feb 12 07:53:31 rush systemd[1]: Started Forward Password Requests to Plymouth.
Feb 12 07:53:31 rush audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295
ses=4294967295 msg='unit=systemd-journal-flush comm="systemd"
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'

After this the log continues to accumulate messages and then eventually...

Feb 12 07:53:47 rush systemd[1]: Received SIGINT.

Which is basically when I hit Ctrl-Alt Delete to restart the system as I simply
cannot enter the passphrase for the encrypted partition.

I would say it's a plymouth problem.