Still having the same issue of the portal becoming unresponsive after random periods of uptime. Running version 20.2.29488.7519 on CentOS 6.10 virtual machine, 1 vCPU, 2GB RAM. When the server is running, it is slightly faster, though that may be due to unloading more than half of the clients to a new Windows VM in Azure. I'm keeping this server around due to many offline agents (computers) that don't get powered on frequently. That way I can point them to my new server without having to manually reinstall the client agent.
Customer support service by UserEcho