No direspect @Arc but what you are telling me is that you guys have no idea what is going on with the anticheat and you don't know how to address this issue.
My firewall is off, directly connected to my router, 80mb/s download 10mb/s upload, no issues with any game but this one. I can play any other game running UE4 and EAC just fine on med to high settings, high FPS and low ping. I know this game is still on beta but to be honest with you it looks more like an alpha and it seems for me that is far away for being done for release day.
My suggestion would be don't close this beta just keep adding hotfixes so players can keep reporting their issues daily then you guys can be aware on what is going on an come with a hotfix maybe every couple days.
I love source Insurgency and that's why i put almost 700 hours playing it in a short period of time. This whole thing reminds me to America's Army which i played for 10 years until they switched to UE4 and broke the game. I downloaded AA:PG the other day and there are pretty much no servers and players around anymore. I just hope this game is not going to go the same path as AA did.
I have had this problem off and on for this second beta round. The first one I think I encountered this once.
If I start INS from steam, I often encounter getting kicked by anticheat. This is typically resolved by going to the INS steamapps folder and starting insurgencyeac.exe manually. When I do that, I usually don't have any issues with EAC, but this is not always a fix.
Additionally, the load times that are discussed here are not the issue that I've encountered with EAC. I happen to sit next to someone with almost identical hardware, except the hard drive in one machine is a platter drive versus solid state. Each system experiences this EAC issue.
Something else experienced with getting kicked due to the false-positive is that I am only kicked once I spawn.
There are times I will join a co-op match, be able to select my gear, but have to spectate for a short time between objectives; as soon as I spawn, I will be kicked either immediately, or after a few minutes of play as described by @facknrite.
In general starting up the game requires me to either go through several crashes, or several EAC-kicks before being able to play through any matches.
Edit: Forgot to mention, the person that I sit next to transferred their installation to an SSD. This was done because loading from the platter drive was too slow, allowing someone else to take the player slot in a co-op game; Because of this, they would not be able to spawn, or even select a team. Instead the user is forced to spectate and is unable to select a team (for the given team available in co-op).