[Podman] Accessing exposed ports from containers

Hi, I'm trying to run a gitea runner with an exposed port where a caching server listens. Dynamically spawned containers want to connect on <hostip>:<exposedport> and get a timeout. The port is exposed in the common way (mapping <extport>:<intport> in docker-compose.yml) and accessible on the external IP from outside. Host-OS is Arch, networking via netavark, default bridge setup and podman 4.9.3. I'm wondering why the containers can't connect to the exposed port on the host while external connections are possible. Regards Bjoern