Can't use tubes in Weld Wheels Draglites?

I've been running Hoosier slicks in Pro Stars with no tubes for years. Yes, they leak down some between races & I just bring them back to pressure before running again. I've also run tubes in Hoosier slicks with no problems, but not near as long as I've run tubeless. When you say the tire "blew", was it under load running & driving or just sitting on the car? Need a little more information.