Ah, thank you. As the German article suggests, the Kugelblitz is a special case of a Geon and, as the English Wikipedia has two separate articles on both phenomena and inter-Wiki linking probably has to be bijective, the German article is linked from Geon, but not from Kugelblitz.
Oh I see. And I think I figured out why the link is missing: https://en.wikipedia.org/wiki/Geon_(physics)
Ah, thank you. As the German article suggests, the Kugelblitz is a special case of a Geon and, as the English Wikipedia has two separate articles on both phenomena and inter-Wiki linking probably has to be bijective, the German article is linked from Geon, but not from Kugelblitz.