Hardware Transcoding issues - ApolloLake & GeminiLake CPUs

DS423+ with GeminiLake CPU HW is not working. No HW logo at all, CPU at 100% and constant buffering. Version 1.32.8.7639. Trying to transcode 4k movie to 1080p or 720p, but no luck. Any ideas or updates on that?DSM 7.2.1-69057 Update 3