As per my response here - it does seem like the new Boundless client contains a high latency issue. But it’s not happening for everyone - so there is likely some combination of hardware, or location, or network driver, or who knows what is triggering it. We will investigate once the team is online again after the New Year (sorry for the delay but this is quite a specialized part of the game).
However, it’s also possible that other players are getting a slow connection for other reasons: bad network drivers, a/v or firewall issues, poor wifi quality (always try wired), router contention, low bandwidth connection, etc. So there might still be something players can do to help themselves.
The tests proposed in this thread will help isolate the most obvious issues.
If the ping (or latency) is over 500ms the game will be unplayable pretty much by configuration. So if you get the “Slow network” message the game will likely micro-reset noticeably (rubber banding, blocks reappearing) - as the delayed messages get ignored.
If the ping (or latency) is over (say) 5000ms = 5s then the game is simply no longer talking to the server in realtime. The connection is blocked or dropped or something.