It sounds like you're looking for the "backstory" or changelog narrative for a specific software or mod update (TRX versions 1.9.5 to 1.9.6) that utilizes the KatoAPI and focused on "bug fixes" (Исправление багов).
Improved error handling. If the API went down or timed out, 1.9.6 introduced better "fail-safes" so the whole application wouldn't crash. It sounds like you're looking for the "backstory"
Ensuring the API calls were more efficient. Users often reported "hangs" or slow response times in 1.9.5, which were addressed in 1.9.6 by optimizing how data is fetched. It sounds like you're looking for the "backstory"