Hi @gonzalocasas,
Yes I have multiple, if you have a very early prototype, you might spot my name on the back of the pcb 
I designed it
I will recompile the lora_gateway with the debug options enabled, but i'm starting to suspect hardware damage of some sort as this gateway has been touched by a lot of people to demo the PCB.
Kind regards,
Sven-Erik Haitjema