Hi,
My issue (which usually gives a 'connection refused') is certainly reproducable - just not 100% of the time. Right now, the client is refusing to connect, but I bet if I try in 10 minutes, it'll work. Sometimes it fails right away, sometimes it's stuck for a minute or 2 logging in.
I ran a traceroute on api.faforever.com:
traceroute api.faforever.com
traceroute to api.faforever.com (116.202.155.226), 30 hops max, 60 byte packets
1 OpenWrt.lan (192.168.1.1) 0.385 ms 0.369 ms 0.446 ms
2 192.168.2.1 (192.168.2.1) 1.328 ms 1.458 ms 1.520 ms
3 p3e9bf094.dip0.t-ipconnect.de (62.155.240.148) 5.900 ms 5.882 ms 5.996 ms
4 n-ea9-i.N.DE.NET.DTAG.DE (217.5.75.90) 25.070 ms 25.247 ms 25.039 ms
5 62.157.248.138 (62.157.248.138) 17.401 ms 17.385 ms 17.509 ms
6 core23.fsn1.hetzner.com (213.239.252.246) 30.588 ms 28.461 ms core24.fsn1.hetzner.com (213.239.252.250) 18.777 ms
7 ex9k1.dc1.fsn1.hetzner.com (213.239.245.234) 18.582 ms ex9k1.dc1.fsn1.hetzner.com (213.239.245.230) 19.002 ms ex9k1.dc1.fsn1.hetzner.com (213.239.245.234) 19.988 ms
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Seems somehow along the way, I do get blocked, and it's not my computer or network doing the blocking. Yet https://downforeveryoneorjustme.com/api.faforever.com says the server is up, so it's my ip that gets blocked perhaps?
Just now, the client logged in, but then is stuck in a weird limbo way:
As I otherwise have no network issues, it does seem there's something in the faf client or server. I now have a hanging client, so there's that. After killing it - it logs in without issues. Traceroute still gives the same outcome.
It all seems magic to me 
If there's anything I can run locally to help track down the issue, just let me know.