Panoramic WiFi modem connection is hot

I have a 2-3 month old modem running on a small table with nothing near it and full 360 ventilation. But  when my internet went out recently, I noticed the metal fitting where the coaxial cable plugs in is very hot to the touch. I bought a new cable, but it’s still hot. Is this a problem? Fire hazard? Could it be causing my internet to shut down? I know I could trade it in for a different one, but that causes the headache of having to reconnect all the devices on WiFi. I don’t want to go through that if I’m going to have the same problem. I have the 1gig Go Super Fast plan. Is the modem compatible with that? Thanks in advance for any advice. I’m currently chatting with Cox and all they want to do is upsell my plan 🙄