correct outdated code.

roles/network_interfaces/tasks/interfaces.yml

@@ -21,15 +21,43 @@
   tags:
     - network-interfaces
 
+- name: (interfaces.yml) Build interface map by device
+  ansible.builtin.set_fact:
+    iface_map: "{{ iface_map | default({}) | combine({ item.device: (iface_map[item.device] | default([])) + [item] }) }}"
+  loop: "{{ network_interfaces | default([]) }}"
+  loop_control:
+    label: "{{ item.device }}"
+  tags: [network-interfaces]
+
 - name: (interfaces.yml) Ensure imported device files at interfaces.d are latest
-  template:
-    src: "etc/network/interfaces.d/device.j2"
-    dest: "{{ network_interface_path }}/device-{{ item.0 }}"
-  with_items: 
-    - "{{network_interfaces | default([]) | groupby('device') }}"
+  ansible.builtin.template:
+    src: etc/network/interfaces.d/device.j2
+    dest: "{{ network_interface_path }}/device-{{ grp.key }}"
+  loop: "{{ iface_map | dict2items }}"
+  loop_control:
+    loop_var: grp
   register: network_configuration_result
-  tags:
-    - network-interfaces
+  tags: [network-interfaces]
+
+#- name: Ensure imported device files at interfaces.d are latest
+#  ansible.builtin.template:
+#    src: etc/network/interfaces.d/device.j2
+#    dest: "{{ network_interface_path }}/device-{{ grp.0 }}"
+#  loop: "{{ (network_interfaces | default([]) | groupby('device')) | list }}"
+#  loop_control:
+#    loop_var: grp
+#  register: network_configuration_result
+#  tags: [network-interfaces]
+
+#- name: (interfaces.yml) Ensure imported device files at interfaces.d are latest
+#  template:
+#    src: "etc/network/interfaces.d/device.j2"
+#    dest: "{{ network_interface_path }}/device-{{ item.0 }}"
+#  with_items: 
+#    - "{{network_interfaces | default([]) | groupby('device') }}"
+#  register: network_configuration_result
+#  tags:
+#    - network-interfaces
 
 # ---
 # Remove device files not configured here

roles/network_interfaces/templates/etc/network/interfaces.d/device.j2

@@ -1,7 +1,7 @@
 {{ ansible_managed | comment }}
 
 {# {% for config in  network_interfaces %} #}
-{% for config in item.1 %}
+{% for config in grp.value %}
 
 {%   if config.headline is defined and config.headline %}
 #-----------------------------