Traffic partly blocked

Oi, i use Comodo now for a few weeks and recently our gameservers traffic is partly blocked.
I use HLSW to see the servers status and when the player limits exceeds a certain amount (15 i think) the status traffic gets blocked.
Also i can not use rcon status on this server then anymore.
But still the server is up and i can play.

I already made some global and application based rules exceptions to allow traffic from servers IP to mine.
Still the traffic gets blocked.
Only when i put the FW level to OFF, all traffic works.
I also see in the logs that UDP packets from the servers IP to mine get blocked.

So, what else can i try to allow the traffic?

PS: FW level is set to Training.