Does not work if running with Speedtest Tracker Container

[Unrepentant-Atheist]

I have a Synology DS918+ with Docker running. I created a Stack and deployed it successfully

---
version: '3.3'
services:
    web-pdf-toolbox:
        container_name: webpdf
        ports:
            - 25568:80
        environment:
            - PUID=1026
            - PGID=100
            - TZ=Europe/Berlin
        labels:
            - deunhealth.restart.on.unhealthy=true
        volumes:
            - /volume1/docker/webpdf:/tmp/pdf/
        restart: always
        image: zpex/web-pdf-toolbox
networks:
  default:
    name: dockernet
    external: true

The /volume1/docker/webpdf is the folder on my Synology. Upload doesn't work. Whenever I try to upload, a folder is created in stay_login=1; . It looks like this on my Synology: /volume1/docker/webpdf/stay_login=1;/ .

I changed

volumes:
    pdf:/tmp/pdf/

so, that docker creates a volume by itself. Still same problem: I still get a folder stay_login=1;, but this time inside the pdf-Volume docker created. I spun um my Ubuntu-VM on VirtualBox and deployed via docker-compose:

---
version: '3.3'
services:
    web-pdf-toolbox:
        container_name: webpdftoolbox
        ports:
            - 25568:80
        environment:
            - PUID=1026
            - PGID=100
            - TZ=Europe/Berlin
        labels:
            - deunhealth.restart.on.unhealthy=true
        volumes:
            - pdf:/tmp/pdf/
        restart: always
        image: zpex/web-pdf-toolbox
volumes:
  pdf:

tested it and it works. Why doesn't it work on my Synology?

More Info here: https://github.com/natpuch/web-pdf-toolbox/issues/22#issuecomment-939321845

[natpuch]

It works on my Synology DS418Play so that's a weird bug. I don't really know how to help you at the moment. Did you use the same browser? There is an issue saying upload does not work on Chrome.

[Unrepentant-Atheist]

Yes, tried it on Chrome, Chromium, Opera, Firefox and Edge.

Firefox = doesn't work Opera = buggy Chrome, Chromium, Edge, Brave = works

On Opera I can upload it, then compress, etc. , but I can't download it. But there's a folder in /volume1/docker/webpdf/ after I compress with Opera, where the file is _compressed.pdf. I can open it fine, so at least that works.

Edit: Okay, now Firefox and Opera works too, I had to clear everything, history, cache, cookies, etc.

Edit2: It doesn't work again. I have more than one container running on the same internal IP 196.168.178.xxx, all they differ from are the ports 196.168.178.xxx:port, whenever I sign into another container other than web pdf toolbox, it stops working. I need to clear the cookies again for it to work. I thinks the hint is somewhere in the folder that's being created stay_login=1;

Edit3: Managed to narrow it down to 1 container that's causing this problem, not sure whether it's this or the other container that's doing it. The other container being: https://github.com/henrywhitaker3/Speedtest-Tracker , it doesn't have any log in, so I think stay_login=1; belongs to it, but not sure. Opened an issue: https://github.com/henrywhitaker3/Speedtest-Tracker/issues/736