Call sent to logged-out agent

Dear All,

I am facing the problem that when the call sent to the queue, sometimes it is sending to the logged-out agent!..
what I missed?
below is my /etc/asterisk/queues_additional.conf

[1]
announce-frequency=30
announce-holdtime=yes
announce-position=yes
answered_elsewhere=0
autofill=no
eventmemberstatus=no
eventwhencalled=no
joinempty=no
leavewhenempty=yes
maxlen=5
memberdelay=0
monitor-type=mixmonitor
monitor-format=wav
penaltymemberslimit=3
periodic-announce-frequency=90
queue-callswaiting=queue-callswaiting
queue-thankyou=queue-thankyou
queue-thereare=queue-thereare
queue-youarenext=queue-youarenext
reportholdtime=yes
retry=5
ringinuse=yes
servicelevel=60
strategy=rrmemory
timeout=15
timeoutpriority=app
timeoutrestart=no
weight=1
wrapuptime=0
context=ivr-2
periodic-announce=custom/menus