Welcome to the Community, I'm sorry for the strange issue you're experiencing at the moment. I've got to say I've never heard this being reported before, so we'd like to take a closer look at where the box is located.
As Parrotperson has mentioned, they don't like getting hot. Is it in an enclosed cabinet / shelf or does it have plenty of space?
I've also tested the box from our end for you, we're not detecting any issues with it at the moment. Does it get hot to touch at all?