Yes,they can overheat,i had a look at some tubeless bike tyres today and they all had ribs on the side of the tyre,i have fitted tubes to tubeless car tyres and have failed because of the ribs.See the thing is with a tube tyre if a nail or if the tube fails it goes down very quickly,with a tubeless tyre it seals around the wheel so the only place the air can get out is around the nail, and may take some time to go down,Maybe a law should be put in place when a bike goes in for a wof,the bike should be failed if there is a tube in a tubeless tyre if may save a life.