Hi @Marc8, I’m sorry to hear you are having this issue. I just went into my own Asana instance and tried to recreate this issue but I can’t seem to recreate it as you described. When I use the Tab-D Shortcut it goes to the Due Date field like it should.
Have you tried restarting your Asana browser to see if that helps? If that doesn’t help, you can always contact Asana Support to get the assistance you need. Here is a link on how to do that