Worked on the elastic/elasticsearch repository to address a stability issue in the Unified Highlighter, focusing on phrase highlighting across multi-value fields. The solution involved implementing the full suite of BreakIterator methods within the BoundedBreakIteratorScanner, ensuring internal state was reset before delegating to the mainBreak iterator. This approach resolved IllegalStateException errors that previously occurred when phrases spanned multiple values, aligning the highlighting logic with updated Lucene segmentation behavior. Utilizing Java and software testing skills, the work improved the reliability and accuracy of search results for multi-valued fields, enhancing both code maintainability and the overall user experience in search applications.