Jackett not reachable after a while

Hi, I recently switched to the Jackett docker version and have a strange problem.
After a system reboot, Jackett runs fine, after a few hours(?) the web-interface is not responding anymore. It looks like the docker container is running ok. In the docker logs, I just see that sometimes the update check fails:
System.Net.Http.HttpRequestException: Resource temporarily unavailable (api.github.com:443)

Even after I restart the container, the issue persists. I tried restarting with
docker-compose restart & docker-compose up -d --build --force-recreate

The only way to fix this, is a machine reboot.

My OS is: Ubuntu 20.04.1 LTS
My Docker: 20.10.1, build 831ebea
Docker Compose yml:


version: ā€œ2.1ā€
services:
jackett:
image: ghcr.io/linuxserver/jackett
container_name: jackett
environment:
- PUID=125
- PGID=131
- TZ=Europe/Brussels
- AUTO_UPDATE=true #optional
volumes:
- /home/docker/.config:/config
- /home/docker/Downloads:/downloads
ports:
- 9117:9117
restart: unless-stopped

Any ideas what is happening here or how to debug this? I’m pretty new to docker, so not experienced how to get to the root of this problem.

Thanks for any help

Looks like I found it. Was nothing within the container, but some problem with Docker Networks and ExpressVPN. Unfortunately looks like a dead end.