Connection Timeout

[Pato Salvaje]

Hello
Since the latest patch launch my squad had not returned to fly online, but yesterday launched a coop mission on the Steppe map and joined 3 pilots. We were able to choose the aircraft and begin the pre-flight and warming up, but when we took a few minutes (usually we were already on the runaway or taking off) client pilots disconnected receiving a Timeout message.
Someone has this problem?
It can be a port problem?
What ports are required to open? when I launch server there is no server port settings ...
Before this patch this problem wasn´t there... we could fly without any issue.

Any ideas?
Attached image problem from a client pilot.

Thanks in advance