sunny6142 commented on issue #15442:
URL: https://github.com/apache/lucene/issues/15442#issuecomment-3557885217
## Reproduction
### Scenario 1: Phrase Expansion Loses Boost
```java
// Create overlapping boosted phrases
Query q1 = new BoostQuery(new PhraseQuery("contract", "termination"), 10.0f);
Query q2 = new BoostQuery(new PhraseQuery("termination", "clause"), 5.0f);
BooleanQuery query = new BooleanQuery.Builder()
.add(q1, SHOULD).add(q2, SHOULD).build();
// FastVectorHighlighter processes this
FieldQuery fieldQuery = new FieldQuery(query, reader, true, true);
// Result: Expanded "contract termination clause" gets boost 1.0 instead of
meaningful value
```
### Scenario 2: Nested Boost
```java
// Create nested boost query
PhraseQuery baseQuery = new PhraseQuery("important", "document");
Query innerBoost = new BoostQuery(baseQuery, 3.0f);
Query outerBoost = new BoostQuery(innerBoost, 2.0f);
// FastVectorHighlighter processes this
FieldQuery fieldQuery = new FieldQuery(outerBoost, reader, true, true);
// Result: Gets boost 2.0, should it get better boost
```
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