uschindler commented on issue #15547:
URL: https://github.com/apache/lucene/issues/15547#issuecomment-3862314966

   Hi see here for the explanation what happened and why the new code is not 
buggy: https://github.com/apache/lucene/issues/8422#issuecomment-1223722482
   
   The problem of people that have hit this was that their own similarity 
implementation did not correctly implemented query normalization so IDF was 
used twice. Actually there was no change in final scores, only how it was 
calculated. In incomplete implementations this caused issues.


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