Search in Diffractor doesn’t work with the Russian letter "Х" in metadata.

Issue:
When searching for files (e.g., videos) by metadata, a query containing the letter "Х" (e.g., "хрущев") returns no results, while the same query without "Х" (e.g., "рущев") successfully finds files.

The search should return files where the metadata contains the requested string, including words with the letter "Х".

Question:
Are there any known solutions or plans to fix this issue? It might be related to encoding or Cyrillic text processing in the search index.