Manager Events not triggered in Daemon mode

Adhearsion v0.8.4

events.rb:

events.asterisk.manager_interface.each do |event|
  case event.name.downcase
  when "hangup"
   ahn_log "events.rb: start hangup event"
   now = Time.new
   ahn_log "events.rb: end hangup event at #{now} "
  end
end # do event

I have three different installations for customers right now with similar behavior. In each case, the code in the "hangup" event does not fire (no logs or DB activity) if AHN is running in "daemon" mode in the background. However, when running in foreground mode, the hangup event fires as expected.

Current work around is to run ahn via the "screen" utility:

screen -d -m ahn start .

AHN is thus running in "foreground" mode on a detached screen session and hangup events are handled correctly.