It's a heat related thing.
This is but one example. I've read this in a number of other places:
https://www.bikeradar.com/advice/buy...ersus-tubeless
Lastly, latex inner tubes are more susceptible to damage from heat. For this reason, most manufacturers recommend against using latex inner tubes in carbon wheels designed for rim brake bikes, especially for any rides that involve heavy sustained braking (such as on long descents, where prolonged braking can cause heat build-up in the rims).
(Personally, I'd be concerned with carbon rims warping under such conditions as well (reference Levi's Gran Fondo caution against the use of carbon rims in the event))
Here we have Lennard Zinn saying that he would no longer use latex tubes in carbon rims:
https://velo.outsideonline.com/road/...ubes-and-more/
Continental claims that latex or light weight butyl tubes shouldn't be used in rims without a rim strip (carbon or aluminum), and recommends their own rimstrip as a heat insulator in these cases.