Because I can’t edit my previous post, I add this reply.
The only way for me to currently start Tumbleweed, is with a tumble weed install USB.
Start rescue system, then I then go to more, and then pick boot a Linux system.
Then the rescue system has a look, and asks if I want to boot Tumbleweed or Leap.
I pick tumble weed, and after two more questions, Tumbleeweed does start.
If I then restart my pc, its again windows that boots.