Is it normal that after more than an hour or two of steady-state, Upstream is using lots of CPU power (radicle-proxy)? I have only a single project, but I added 2 more seed nodes. Upstream shows that I’m no longer connected to any of the peers, though… Perhaps a forgotten sleep in the reconnection logic? 
You could be running into Connection rate limit needed for reliability · Issue #678 · radicle-dev/radicle-link · GitHub
There are some new nodes behaving badly. Are you able to verify you don’t have active connections to 188.120.224.0/20 when this happens?