SOLVED: Playback error on browser but not mobile

[Enla]

What are your hardware specs?  And can you share your docker compose for the Jellyfin container?

I'm running an i7-7100t and use QSV, which I know works as I reencoded a lot of my library with it. As for the full docker compose:

Code:

  jellyfin:
    image: lscr.io/linuxserver/jellyfin:latest
    container_name: jellyfin
    environment:
      - PUID=${USER_ID}
      - PGID=${GROUP_ID}
      - TZ=${TIMEZONE}
      - JELLYFIN_PublishedServerUrl=${HOSTNAME}/jellyfin
    volumes:
      - ${CONFIG_ROOT:-.}/jellyfin:/config
      - ${DATA_ROOT}:/data
    ports:
      - "7359:7359/udp"
      - "1900:1900/udp"
    restart: always
    healthcheck:
      test: [ "CMD", "curl", "--fail", "http://127.0.0.1:8096/jellyfin/health" ]
      interval: 30s
      retries: 10
    labels:
      - traefik.enable=true
      - traefik.http.routers.jellyfin.rule=(Host(`${HOSTNAME}`) && PathPrefix(`/jellyfin`))
      - traefik.http.routers.jellyfin.tls=true
      - traefik.http.routers.jellyfin.tls.certresolver=myresolver
      - traefik.http.services.jellyfin.loadbalancer.server.port=8096
      - homepage.group=Media
      - homepage.name=Jellyfin
      - homepage.icon=jellyfin.png
      - homepage.href=/jellyfin
      - homepage.description=Media server
      - homepage.weight=4
      - homepage.widget.type=jellyfin
      - homepage.widget.url=http://jellyfin:8096/jellyfin
      - homepage.widget.key=${JELLYFIN_API_KEY}