[RMVX ACE] BOSS BATTLE PROBLEM(S)

I have set up a Battle Process as I have successfully done several times. This time I am having trouble with the battle stalling after the 1st round and getting a screen that makes no sense.
The first round executes Boss and party all attack. Then just the BGM.
I am showing the Event pages, the Enemy and Troop setups, and the screenshot that makes no sense at all.

This is the Enemy setup page:


This is the Troop setup page: The battle test worked perfectly.


Event Page 1



Event Page 2


Event Page 3



Image that makes no sense. It say "was slain" but, nobody died and it doesn't say who was slain????

author=Marrend
The message window in the last screencap indicates a regular attack to me. Which should have a target. There might be something really funky going on, but, I'm not sure what. I wonder if it has something to do with whatever scripts you might be running?

I'm not using any scripts. This game. so far, anyway, is purely events, switches and variables.

author=Marrend
Well, if it were me, I'd setup a separate code-section, and do some debugging on the battle log.

class Window_BattleLog < Window_Selectable
  #--------------------------------------------------------------------------
  # * Display Action Results
  #--------------------------------------------------------------------------
  def display_action_results(target, item)
    puts(target, item) # <-- This should output the contents of the variables "target" and "item" into the console so that
      # you know what their values are before anything happens to them.
    if target.result.used
      last_line_number = line_number
      display_critical(target, item)
      display_damage(target, item)
      display_affected_status(target, item)
      display_failure(target, item)
      wait if line_number > last_line_number
      back_to(last_line_number)
    end
  end
end

Thank you, Marrend