Hi Arthur,
I'm facing a similar issue with an LTR query over multiple collections in
SolrCloud. The issue is that the documents returned and merged into a
single page will have scores that don't look like sorted at all.
For example (this is a single page of results):
// collection1
-2.1818457
-2
Hi.
We're LTR and after switching to multiple shards we found that rerank
happens on individual shards and during the merge phase the first pass
score isn't used. Currently our LTR model doesn't use textual match and
assumes that reranked documents are already more or less good in terms of
textual
