when using the original docker container, map turns back when rendering screenshot (amd64)

[kx1t]

When using this container -- tedder42/browser-screenshot-service, on several machines (but definitely on AMD64 VMs), screenshots are rendered like the attached photo.

No errors are displayed in the container logs:

INFO:     Uvicorn running on http://0.0.0.0:5042 (Press CTRL+C to quit)
Uvicorn running on http://0.0.0.0:5042 (Press CTRL+C to quit)
2022-02-17 23:25:08 hi.
pulling url: http://tar1090/?icao=8964A5&zoom=11&hideSidebar&hideButtons&mapDim=2.0&monochromeMarkers=ff0000&outlineColor=505050&iconScale=1.5&basemap=osm_adsbx
disabling dev-shm-usage
okay, got the basic canvas.
elapsed time: 18.69sec
INFO:     172.21.0.11:57010 - "GET /snap/8964A5 HTTP/1.1" 200 OK

This is the services section from docker-compose.yml

  screenshot:
    image: tedder42/browser-screenshot-service
    tty: true
    container_name: screenshot
    hostname: screenshot
    restart: always
    shm_size: 1gb
    environment:
      - MAP_ARGS=zoom=11&hideSidebar&hideButtons&mapDim=2.0&monochromeMarkers=ff0000&outlineColor=505050&iconScale=1.5&basemap=osm_adsbx
      - LOAD_SLEEP_TIME=15
      - BASE_URL=http://tar1090/
      - DISABLE_SHM=true
      - MAXTIME=60

This is how the container was invoked from inside another container in the same stack:

curl http://screenshot:5042/snap/8964A5 > pic.png