I am writing this post just to update the topic about new things with this error.
(Btw English isn't my mother tongue, so I'm sorry if I sound rude as this isn't my intention).
As many staff members explained to me, I know that the error is due to packet loss with unstable connections.
I did a few tests (which prove obviously nothing but allow to have some hypothesis). With my PC and my connection, as long as I play with K/M, the error doesn't happen a single time.
But as soon as I use my controller and I aim + shoot (as shown in this video https://streamable.com/tbpwe8 by mikey ), I get immediately kicked out of servers, without any lags, with the error displayed on the main menu.
Does using a controller require a better connection and cause the command overflow error?
Another thing I noticed is that I cannot join the server I was kicked out of just before with the error because I get an error message "You are already connected to the server". But I have seen on other topics that I have to wait about 30 seconds to join the server again (which works).
Besides, I often get a bug that forces me to restart Plutonium T6. For example, if I get kicked from the RepZ Nukejacked server with the error and I want to join, right after, another RepZ server, the map loading screen of the server is stuck for 5-6 minutes on "Awaiting gamestate". Is it normal?
Thanks in advance and good luck if you are working for a patch.