Strange behaviour on Fedora CoreOS

[RTechSn]

Hi.
I have recently switched to Fedora CoreOS for my projects.
This is my third installation of NPM, and docker-compose file is mostly unchanged, apart from adding :z to mounts, which is required if you have SE Linux enabled.
I'm running into a strange problem that i don't know how to debug.
NPM periodically (at random) stops responding to http(s) requests.
Docker shows that container is running, and container log only shows that everything has started and ready for connections.
The moment i do "docker-compose up -d", and it says that it is already up to date, everything works again.
Which way do i look to resolve this?