Another thought: What about static discharge? Is it possible that the MKR WAN 1310 is sensitive to that when being handled? The Uno and Mega come with plastic bottoms but the MKR does not.
Another thought: What about static discharge? Is it possible that the MKR WAN 1310 is sensitive to that when being handled? The Uno and Mega come with plastic bottoms but the MKR does not.