I have an annoying behavior for a community server 8.5, docker setup. As long as i keep this instance connected to the internet, everything is going smoothly. After the server is no longer connected to the internet, all apps begin to respond slowly, about 10 seconds between choosing to change the context (seems to be a timeout), from 'documents' section to 'mail' section, for example. During the installation I'm using a public ip address for the host server and when I disconnect it i'm using a private class of ip addresses.
P.S. Looking more carefully I realised that the browser is waiting for some responses from open tcp connections with other external sites. Is there any way to fix this?