Attempt to fix shield as a source when casting

config/lovelace/advanced_dashboard/08_automations.yaml

@@ -96,7 +96,7 @@ cards:
             - automation.tv_state_sync_on_tv_off
             - automation.tv_state_sync_on_shield_on
             - automation.tv_state_sync_on_shield_off
-            - automation.tv_sonos_join_tv_on_google_cast
+            - automation.tv_prepare_for_casting
             - type: divider
             - automation.tv_plex_setup_house_for_plex
             - automation.tv_plex_restore_house_after_plex

config/packages/devices/living_room/tv.yaml

@@ -162,7 +162,7 @@ automation:
           message: "Sync TV state · Turning TV off - Shield is off"
           domain: media_player
 
-  - alias: TV · Sonos join TV on Google Cast
+  - alias: TV · Prepare for casting
     trigger:
       platform: state
       entity_id: media_player.nvidia_shield
@@ -177,6 +177,11 @@ automation:
           name: "📺 Media Module · "
           message: "TV · Google Cast - Joining Sonoses"
           domain: media_player
+      - delay: "00:00:10"
+      - service: media_player.select_source
+        entity_id: media_player.living_room_tv
+        data:
+          source: Shield
 
 homeassistant:
   customize: