netbird_client: write the MTU even when an earlier task already stopped netbird

netbird_client/tasks/config.yml

@@ -47,6 +47,7 @@
   when: netbird_config_mtu_file.content is defined
   vars:
     netbird_config_mtu: "{{ netbird_config_mtu_file.content | b64decode | from_json }}"
+    netbird_mtu_differs: "{{ (netbird_config_mtu.MTU | default(0)) != (netbird_client.mtu | int) }}"
   tags: netbird_client_config
   block:
     # netbird writes its in-memory config back on exit, so edit only while it is stopped
@@ -54,15 +55,14 @@
       systemd:
         name: netbird
         state: stopped
-      when: (netbird_config_mtu.MTU | default(0)) != (netbird_client.mtu | int)
+      when: netbird_mtu_differs
       notify: restart_netbird
-      register: netbird_mtu_stopped
 
     - name: Re-read netbird config after stop
       slurp:
         src: /var/lib/netbird/default.json
       register: netbird_config_mtu_stopped
-      when: netbird_mtu_stopped is changed
+      when: netbird_mtu_differs
 
     - name: Write MTU
       copy:
@@ -71,7 +71,8 @@
         mode: "0600"
       vars:
         cfg: "{{ netbird_config_mtu_stopped.content | b64decode | from_json }}"
-      when: netbird_mtu_stopped is changed
+      when: netbird_mtu_differs
+      notify: restart_netbird
 
 - name: Set netbird log level
   copy: