Blynk server working ok?

I have blynk running on my arduino Mega with ethernet shield.

It was working okey for three days but now, everytime I change the state of a switch, the arduino receives the command, changes the relay state, and after that it gets disconnected (it turns off the relay because it is programmed on disconnection).

The network is working ok. The code is the same it was working fine some days ago.

Anyone with the same issue?

Please post your code. Usually this is reason 1 of troubles.