Kernrechtsfrage
Whether the cantonal judges were disqualified because of prior involvement
Extrahierter Entscheid
The disqualification objection was forfeited because it was not raised immediately after the alleged ground became known.
Extrahierte Begründung
A party must invoke a recusation ground without delay. The appellants knew, or should have known, that the judges might sit in the case, yet waited until federal appeal.