Not an issue we've seen I'm afraid, but I'll report it to the software team.
Please specify very hot, as saying something is hot without any kind of comparison makes it very hard for the other end to comprehend how hot very hot is.
Yes, 802.11ac routers run hot, even more so 3x3 routers as they have no less than six power amplifiers in them and as we move on to higher speeds, they'll get even hotter.
The Almond+ might feel hot, but we have a heatpipe cooling the hot components and it distributes the heat more even, so there are no hotspots inside the device itself and it does in fact have superior cooling to all routers we're aware of that doesn't contain a fan. The small size makes it run warmer as well, but we've tested it and it doesn't have any heat issues and it doesn't fail because it's hot.
That said, it's very possible that there's something wrong with your unit, so if you can provide some more precise data, we'll get it looked into.