GSM library issue

If anyone is experienced in this library, I'm having an issue with

GSM.isAccessAlive()

According to the library's comments, the function checks if there is Network access, returns 1 for Alive and 0 for down.

The second I call this function (to see if I have to reconnect to the GSM network), I stop having connection.

If I remove this function (and "lose" the potential ability to check if reconnection is needed), Program works flawlessly.

Anyone else experienced this? I can only guess it's a problem with the library.

Thank you all in advance.