Kernrechtsfrage
Whether the complaint could be heard despite the appellant's late bias challenge against the commercial court rapporteur.
Extrahierter Entscheid
The bias argument was forfeited because it was not raised immediately after the alleged incident and was therefore no longer available in the appeal.
Extrahierte Begründung
A party must invoke a recusal ground without delay after learning of it; waiting until after an adverse decision violates good faith.