Replay #22800257
The messages say "toggled AI_RunOpponentAI is now off" and "toggled AI_RunOpponentAI is now on". Looking at the replay now, I see the messages came quite a few times. They weren't just 1 message before the pause and another after.
Perhaps that's a game capability I accidentally turned on/off by pressing some keyboard combination? I make quite a few unintended/accidental keyboard presses during a game :-). But it's clear from the chat that I and another player was seeing those notifications at the same time...
Can another player cause light great fast-fading messages like that to appear for all the other players?

I was playing a 3v3 matchmaking game, and after a few minutes we saw a light grey quickly fading message something like "an opponent AI has been turned off". Then a player paused, said they needed a minute. They came back, and after a short time, a similar message showed "... opponent AI is on".
What does this mean? Does it mean a player was using a mod, or that one of the opponents was an AI? Perhaps one player is using an AI as support (e.g. doing their eco)?
It was a weird balance game too. One team with 800-1000 people, and the other team had one 1600+, and two lower ranked. Balanced overall, just with 1 ringer player.

I can log into the FAF client and join a custom game. The FAF game is launched, but I never get to the lobby. I end up on with the "connecting" dialog and the "abort connect" button forever (until I give up). Two friends (one of whom set up the game), don't have this problem.
I've tried 5-6 times, including rebooting my machine in-between, and restarting the FAF client several times. The same outcome keeps repeating.

Known issue? Something I can do to fix it?

Aha. Thanks for that update @Melanol . That explains why the issue has come back for me. It's not easy for a small service like FAF to protect against DDoS. Perhaps it's some a**hole who got banner from playing.

Thanks @magge . This resolved itself for me.

Creating a new thread for the continuation of FAF client login issues, as requested by @magge on thread #1.

Here's a snapshot of what my client keeps logging in the log files as the UI keeps spinning on "logging in". I've tried starting the client offline. I tried starting with a fresh client.prefs file. Not sure what else to try...
2023-10-08T09:39:30.223-07:00 DEBUG 14064 --- [reactor-tcp-nio-2] c.faforever.commons.lobby.FafLobbyApi : Starting session listener
2023-10-08T09:39:30.224-07:00 INFO 14064 --- [reactor-tcp-nio-2] c.faforever.commons.lobby.FafLobbyApi : Connected to lobby.faforever.com on port 8002
2023-10-08T09:39:30.397-07:00 ERROR 14064 --- [reactor-tcp-nio-2] c.faforever.commons.lobby.FafLobbyApi : Inbound channel closed with error

java.net.SocketException: Connection reset
at java.base/sun.nio.ch.SocketChannelImpl.throwConnectionReset(SocketChannelImpl.java:394)
at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:426)
at io.netty.buffer.UnpooledDirectByteBuf.setBytes(UnpooledDirectByteBuf.java:570)
at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1132)
at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:357)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:151)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:833)

2023-10-08T09:39:30.398-07:00 INFO 14064 --- [reactor-tcp-nio-2] c.faforever.commons.lobby.FafLobbyApi : Inbound channel cancelled
2023-10-08T09:39:30.398-07:00 INFO 14064 --- [reactor-tcp-nio-2] c.faforever.commons.lobby.FafLobbyApi : Outbound channel cancelled
2023-10-08T09:39:30.399-07:00 INFO 14064 --- [reactor-tcp-nio-2] c.faforever.commons.lobby.FafLobbyApi : Disconnected from server
2023-10-08T09:39:30.399-07:00 INFO 14064 --- [reactor-tcp-nio-2] c.faforever.commons.lobby.FafLobbyApi : Attempting to reconnect
2023-10-08T09:39:30.399-07:00 INFO 14064 --- [reactor-tcp-nio-2] c.faforever.commons.lobby.FafLobbyApi : Disconnected from server
2023-10-08T09:39:30.400-07:00 INFO 14064 --- [reactor-tcp-nio-2] c.faforever.commons.lobby.FafLobbyApi : Attempting to reconnect
2023-10-08T09:40:30.224-07:00 WARN 14064 --- [parallel-4] c.faforever.commons.lobby.FafLobbyApi : Could not reach server retrying: Attempt #1 of 10

java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 60000ms in 'flatMap' (and no fallback has been configured)
at reactor.core.publisher.FluxTimeout$TimeoutMainSubscriber.handleTimeout(FluxTimeout.java:295)
at reactor.core.publisher.FluxTimeout$TimeoutMainSubscriber.doTimeout(FluxTimeout.java:280)
at reactor.core.publisher.FluxTimeout$TimeoutTimeoutSubscriber.onNext(FluxTimeout.java:419)
at reactor.core.publisher.FluxOnErrorReturn$ReturnSubscriber.onNext(FluxOnErrorReturn.java:162)
at reactor.core.publisher.MonoDelay$MonoDelayRunnable.propagateDelay(MonoDelay.java:271)
at reactor.core.publisher.MonoDelay$MonoDelayRunnable.run(MonoDelay.java:286)
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68)
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)

2023-10-08T09:41:00.570-07:00 DEBUG 14064 --- [reactor-tcp-nio-3] c.faforever.commons.lobby.FafLobbyApi : Starting session listener
2023-10-08T09:41:00.572-07:00 INFO 14064 --- [reactor-tcp-nio-3] c.faforever.commons.lobby.FafLobbyApi : Connected to lobby.faforever.com on port 8002
2023-10-08T09:41:00.741-07:00 ERROR 14064 --- [reactor-tcp-nio-3] c.faforever.commons.lobby.FafLobbyApi : Inbound channel closed with error

java.net.SocketException: Connection reset
at java.base/sun.nio.ch.SocketChannelImpl.throwConnectionReset(SocketChannelImpl.java:394)
at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:426)
at io.netty.buffer.UnpooledDirectByteBuf.setBytes(UnpooledDirectByteBuf.java:570)
at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1132)
at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:357)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:151)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:833)

2023-10-08T09:41:00.743-07:00 INFO 14064 --- [reactor-tcp-nio-3] c.faforever.commons.lobby.FafLobbyApi : Inbound channel cancelled
2023-10-08T09:41:00.743-07:00 INFO 14064 --- [reactor-tcp-nio-3] c.faforever.commons.lobby.FafLobbyApi : Outbound channel cancelled
2023-10-08T09:41:00.744-07:00 INFO 14064 --- [reactor-tcp-nio-3] c.faforever.commons.lobby.FafLobbyApi : Disconnected from server
2023-10-08T09:41:00.745-07:00 INFO 14064 --- [reactor-tcp-nio-3] c.faforever.commons.lobby.FafLobbyApi : Attempting to reconnect
2023-10-08T09:41:00.746-07:00 INFO 14064 --- [reactor-tcp-nio-3] c.faforever.commons.lobby.FafLobbyApi : Disconnected from server
2023-10-08T09:41:00.748-07:00 INFO 14064 --- [reactor-tcp-nio-3] c.faforever.commons.lobby.FafLobbyApi : Attempting to reconnect

FYI, I added to an existing post about this in the Nvidia forum. It only has the thread starter and my reply so far.
https://www.nvidia.com/en-us/geforce/forums/geforce-graphics-cards/5/471621/stuttering-in-supreme-commander-2-after-span-class/
I'll try to figure out how to open a support case.

FYI for others who run into a similar problem, this issue went away for me when I downgraded the Nvidia driver to 472.12. I've tried upgrading again twice, and both times I ran into the same perf issues. The perf issues don't show up in any other game I've tried, only SupCom FA.

I installed Nvidia 493.13 earlier today. Played a FAF game just now. Super laggy. Flickering cursor. Game lags when moving the mouse and when zooming in/out. It was as if the Nvidia cursor bug is back. Downgraded driver back to 472.12. Flickering cursor and lag disappears.
I tried doing the in-game console fix with the d3d_windowscursor (or similar command, I forget exactly what the command text it), and that didn't mitigate the issue.
Has anyone else tried Nvidia driver 493.13 and experienced the same?