This is more info post, that a serious problem, but if someone know better free heroku.com alternatives to host demo channel, you can hint it here (requirements are nodejs+websockets support). You can also discuss some workarounds about current hosting service, if you want to make demo look little better.
This channel uses free tier on render.com service, and has such limitations:
Disconnections is common problem for this service: https://community.render.com/t/cant-use-node-js-websockets-on-free-plan-no-solution-yet/6376
This is more info post, that a serious problem, but if someone know better free heroku.com alternatives to host demo channel, you can hint it here (requirements are nodejs+websockets support). You can also discuss some workarounds about current hosting service, if you want to make demo look little better.