WAND does not work correctly on multiple segments in Solr 8.6.3

In Solr 8.6.3, minCompetitiveScore of WANDScorer resets to zero for each index segment and remain zero until maxScore is updated.
There are two causes of this problem:

• MaxScoreCollector does not set minCompetitiveScore of MinCompetitiveScoreAwareScorable newly generated for another index segment.
• MaxScoreCollector updates minCompetitiveScore only if maxScore is updated. This behavior is correct considering the purpose of MaxScoreCollector.

For details, see the attached pdf.

Note

This problem occurs in distributed search (SolrCloud) or the fl=score parameter specified.