I'm not familiar with that particular piece of equipment. I have seen cable boxes that were stuffed into cabinets or had papers / manuals laid over the air vents get to hot to touch. I could see this happening if the venting is through the top and it was covered.
Never argue with an idiot, they will drag you down to their level and beat you with experience. Winston Churchill
This is CABL.com posting #351561. Tiny Link: cabl.co/mbDCv