Traefik infront "sleeping" cloud run retry middleware

Traefik Traefik v2 (latest)
1

Hey ,
Im using traefick to split traffic to two other cloud run services.
Im trying to configure a retry middleware that if i get 404 traefick will retry again.

The reason of the 404 is that cloud instance is destroyed if no traffic arrive.
I can solve this issue if i prevent the cold start and configure instance to 1 and it will be always on but i want to save the billing by using traefick retry middleware

http:
  middlewares:
    test-retry:
      retry:
        attempts: 4
        initialInterval: 150ms    
  # Add the router
  routers:
    router-http:
      entryPoints:
      - web
      middlewares:
      - test-retry
      service: wrr1
      rule: PathPrefix(`/`)
    router-https:
      entryPoints:
      - websecure
      middlewares:
      - test-retry
      service: wrr1
      rule: PathPrefix(`/`)
      tls: {} 
        
 
  # Add the middleware
#   middlewares:
#     my-basic-auth:
#       basicAuth:
#         users:
#         - test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/
#         - test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0
#         usersFile: etc/traefik/.htpasswd
  services:
    wrr1:
      weighted:
        sticky:
          cookie:
            name: lvl1
        services:
          - name: whoami1
            weight: 1
          - name: whoami2
            weight: 1

    whoami1:
      loadBalancer:
        passHostHeader: false
        sticky:
          cookie:
            name: lvl2
        servers:
          - url: https://YYYY.run.app/
#          - url: https://ya.ru

    whoami2:
      loadBalancer:
        passHostHeader: false
        sticky:
          cookie:
            name: lvl2
        servers:
          - url:  https://QQQQ.run.app