My keyframes have dissapeared, but the animations are still working. Its not the keyframes what dissapeared. It is the "Rig" under "Summary" So if I turn off "Only keyframes from selected area" its shows the models and its shape keys but not the rigs. I tried searching for unhide keys or select all frame all reload the blend file etc etc.
It started first when I changed to the "Nonlinear Animation" tab (I wanted to loop an animation, So I Split-ed a track) It happened one time when I switched to Graph editor or Dope sheet I don't remember. I did not find the solution to that I just reloaded an old save.