A German Court
That must have been one of the shortest times on record for a European court to give a US corporation a flea in its ear.
German courts are famous for not taking certain forms of nonsense. They have form.
ICANN went to a German court, the first day of GDPR. That smells of jurisdiction-shopping. They wanted to lose, and they wanted a quick and clean loss. They got it. They even picked on a suitably deep-pocketed victim to be sure that being properly lawyered wouldn't cause undue pain and perhaps a perverse result (like going out of business).
Now they have a result they need to help deal with their own internal politics and shady lobbyists.