v1 competition unpacker not creating computation columns

I have a V1/V2 challenge with multiple tasks. The final rank of a participant is computed regarding its average score on all tasks.

It works on Codalab V1:

But the exact same bundle and submission on Codalab V2 gives:

Here is the YAML configuration of the leaderboard:

leaderboard:
  columns:
    auc_classification:
      label: Classification (AUC ROC)
      leaderboard: &id001
        label: RESULTS
        rank: 1
      rank: 2
      sort: desc
    acc_selection:
      label: Feature Selection (accuracy)
      leaderboard: *id001
      rank: 3
      sort: desc
    acc_causality:
      label: Causal Inference (accuracy)
      leaderboard: *id001
      rank: 4
      sort: desc
    ave_score:
      label: < Rank >
      leaderboard: *id001
      rank: 1
      sort: asc
      computed:
        operation: Avg
        fields: auc_classification, acc_selection, acc_causality
  leaderboards:
    RESULTS: *id001