Minimserver sample rate stuck at WAV/48kHz/16 bits/stereo

[Yitaro]

Need help. I am using BubbleUPnP and minimserver on Synology ds918+ NAS. Everything was working normally. When I play 192kHz/flac/24 bits music files, my DAC shows exactly the same sample rate.

Now lately, when I play the same 192kHz flac files, the BubbleUPnP app shows FFmpeg:WAV/48kHz/16 bits/stereo. My dac also shows WAV/48kHz/16 bits.
It doesn't matter what type of files and sample rate I play, the BubbleUPnP shows FFmpeg:WAV/48kHz/16 bits/stereo. It seem my miniserver is stuck at FFmpeg:WAV/48kHz/16 bits/stereo.

I tried deleting all my stream.transcode and putting "none" in stream.converter. Still the same.
What is going on? Please help Simon.