Self-hosted Grist stopped recognizing user login

Hi, I’ve been using Grist self-hosted for several months, and it’s been great for my use case. At some point in the past few weeks, however [assuming it has something to do with a recent release], Grist started forcing me to operate as “@Guest”. Clicking “Sign In” does nothing. Setting GRIST_DEFAULT_EMAIL does nothing. Has anyone else experienced this as new behavior? Below’s my docker compose. Is there something wrong with my setup? Thanks!

 grist:
    image: gristlabs/grist:latest
    container_name: gristCore
    env_file:
      - .env
    networks:
      traefik_proxy:
        ipv4_address: 192.168.5.36
      default:
    environment:
      - DEBUG=1
      - GRIST_DATA_DIR=/docs
      - APP_DOC_INTERNAL_URL=https://localhost:8484
      - APP_DOC_URL=https://grist.$DOMAINNAME_CLOUD_SERVER
      - APP_HOME_URL=https://grist.$DOMAINNAME_CLOUD_SERVER
      - GRIST_SINGLE_ORG=docs
      - GRIST_ORG_IN_PATH=false
      - GRIST_SUPPORT_ANON=false
      - GRIST_DOMAIN=https://grist.$DOMAINNAME_CLOUD_SERVER
      - GRIST_FORWARD_AUTH_HEADER=X-Forwarded-User
      - GRIST_FORWARD_AUTH_LOGOUT_PATH=_oauth/logout
      - GRIST_DEFAULT_EMAIL=$myEmail
      - GRIST_SESSION_COOKIE=grist.$DOMAINNAME_CLOUD_SERVER
    ports:
      - "8484:8484"
    volumes:
      - /$DOCKERDIR/appdata/grist/data:/persist
      - /$DOCKERDIR/appdata/grist/docs:/docs
    labels:
      - "traefik.enable=true"
      ## HTTP Routers
      - "traefik.http.routers.grist-rtr.entrypoints=https"
      - "traefik.http.routers.grist-rtr.rule=Host(`grist.$DOMAINNAME_CLOUD_SERVER`)"
      ## Middlewares
      - "traefik.http.routers.grist-rtr.middlewares=chain-oauth@file"
      ## HTTP Services
      - "traefik.http.routers.grist-rtr.service=grist-svc"
      - "traefik.http.services.grist-svc.loadbalancer.server.port=8484"
      ## Homepage Labels
      - "homepage.group=Applications"
      - "homepage.name=Grist"
      - "homepage.icon=grist.png"
      - "homepage.href=https://grist.$DOMAINNAME_CLOUD_SERVER"
      - "homepage.description=Spreadsheet Database"

Hi @Jay_Trickett, sorry for the change in behavior, you may be affected by the security update described here: