Client from Germany with IPv6 get disconnected after 2-5 minutes without stack error

Hello

I have a really strange problem

It only happens with clients from germany, they all told me they had a IPv6 connection using Wifi

Once they connect, after 2-5 minutes they get disconnected, there is no error at all

That's really strange, i use default kryonet settings, no tcp/udp timeout change at all

I'm sending both TCP and UDP packets, at a rate of ~5 packets/seconds per client, around 30 clients connected at same time

TCP:54555, UDP:54777

Right after they connect they get flagged as IDLE

``` java
client.addListener(new Listener()
{

@Override
public void idle(Connection connection)
{
super.idle(connection);
System.out.println("DEBUG: WARN: IDLE!");
}
}
```

I have no idea why, and how to fix that..