It was due to a pipe connected to the rain gutter in the house. At the beginning of the rain, the amount of water streaming through was hitting perfectly a joint in the internet cable. So it was happening only when the rain started, and stopping when the little stream got stronger and consequently jumping it and not hitting the cable joint anymore. It was discovered by the technician. He found it somewhere in the 100m of the cable coming out from the street pole, not an easy task.
It was due to a pipe connected to the rain gutter in the house. At the beginning of the rain, the amount of water streaming through was hitting perfectly a joint in the internet cable. So it was happening only when the rain started, and stopping when the little stream got stronger and consequently jumping it and not hitting the cable joint anymore. It was discovered by the technician. He found it somewhere in the 100m of the cable coming out from the street pole, not an easy task.