List light that goes unavailable

Configuration
1

Hello. I need some help with my code. I want to list the light that goes unavailable in my group.light_status. Below is what I have. It kinda works, but it does not list the next light that goes unavailable.

  {% set list = state_attr(('group.light_status'), 'entity_id') %}
  {%  if states.light | selectattr('entity_id', 'in', list) | selectattr('state','eq','unavailable') | list | count >=1 %}
  {% set light = states.light | selectattr('entity_id', 'in', list) | selectattr('state','eq','unavailable') | map(attribute='entity_id') | sort(attribute='last_changed') | last %}
    {{ light }}
  {% endif %}


group:
  light_status:
    - light.wc_1
    - light.g_1
    - light.h_1
    - light.c_1
    - light.s_1
    - light.l_1 
    - light.k_1