ForwardAuth is not loading requested Path after successful authentication

[prutheus]

I want to use ForwardAuth to secure my traefik frontend, which I serve at mydomain.org/traefik:

services:
    traefik:
        image: traefik
        restart: always
        command:
            - "--providers.docker"
            - "--providers.docker.network=traefik"
            - "--entrypoints.web.address=:80"
            - "--entrypoints.websecure.address=:443"
            - "--certificatesresolvers.letsencryptresolver.acme.httpchallenge=true"
            - "--certificatesresolvers.letsencryptresolver.acme.httpchallenge.entrypoint=web"
            - "--certificatesresolvers.letsencryptresolver.acme.email=mail@mydomain.org"
            - "--certificatesresolvers.letsencryptresolver.acme.storage=/letsencrypt/acme.json"
            - "--entrypoints.web.http.redirections.entryPoint.to=websecure"
            - "--entrypoints.web.http.redirections.entryPoint.scheme=https"
            - "--api.dashboard=true"
            - "--accesslog=true"
        ports:
            - "80:80"
            - "443:443"
        volumes:
            - certificates:/letsencrypt
            - /var/run/docker.sock:/var/run/docker.sock:ro
        labels:
            - "traefik.http.routers.cloud-network-traefik.rule=Host(`mydomain.org`) && (PathPrefix(`/traefik`) || PathPrefix(`/api`))"
            - "traefik.http.routers.cloud-network-traefik.entrypoints=websecure"
            - "traefik.http.routers.cloud-network-traefik.tls.certresolver=letsencryptresolver"
            - "traefik.http.routers.cloud-network-traefik.service=api@internal"
            - "traefik.http.routers.cloud-network-traefik.middlewares=cloud-network-traefik-stripprefix,cloud-network-forwardauth"
            - "traefik.http.middlewares.cloud-network-traefik-stripprefix.stripprefix.prefixes=/traefik"
        networks:
            - traefik

    forwardauth:
        image: thomseddon/traefik-forward-auth
        restart: always
        environment:
            DEFAULT_PROVIDER: oidc
            PROVIDERS_OIDC_ISSUER_URL: https://id.mydomain.org/realms/auth
            PROVIDERS_OIDC_CLIENT_ID: cloud-network
            PROVIDERS_OIDC_CLIENT_SECRET: 123412341234
            SECRET: 8123412341234
        labels:
            - "traefik.http.routers.cloud-network-forwardauth.rule=Path(`/_oauth`)"
            - "traefik.http.routers.cloud-network-forwardauth.entrypoints=websecure"
            - "traefik.http.routers.cloud-network-forwardauth.tls.certresolver=letsencryptresolver"
            - "traefik.http.routers.cloud-network-forwardauth.tls=true"
            - "traefik.http.services.cloud-network-forwardauth.loadbalancer.server.port=4181"
            - "traefik.http.routers.cloud-network-forwardauth.middlewares=cloud-network-forwardauth"
            - "traefik.http.middlewares.cloud-network-forwardauth.forwardauth.address=http://forwardauth:4181"
            - "traefik.http.middlewares.cloud-network-forwardauth.forwardauth.authResponseHeaders=X-Forwarded-User,X-Auth-Request-Email,Set-Cookie,X-Auth-Request-Access-Token,Authorization,X-Auth-Request-Redirect"
            - "traefik.http.middlewares.cloud-network-forwardauth.forwardauth.trustForwardHeader=true"
        networks:
            - traefik

However, when I open https://mydomain.org/traefik I get redirected to my auth provider to sign in, and when done, I get redirected to https://mydomain.org instead of /traefik ... any ideas?