Hardware Transcoding broken when burning subtitles ApolloLake-based Synology NASes

I bit the bullet on HW transcoding after fixing my anime/anime movies name issues. I share my library of tv and movies with family. When I tried using the HW transcode it hung for a little while and showed the garbled mess. SSH was a pain as it kept denying accesses but after a post that showed how to do it as a task, it worked with the old fallback driver.

Seeing this has been a long running issue, any random guesses on a ETA for a stable updated driver version? I rather like not slamming the CPU for when we both happen to be watching something.