Volumio DSD/DSF/DFF/SACD-ISO files not showing in the media list

My RPi 2B is hooked to a HiFiBerry DAC, then to the Amp and so on.
The RPi is streaming media over wifi from a USB drive on the Router. It’s all good playing flacs, but when it comes to SACD-ISO, DSD, DSF or DFF files, they are just not shown in the media list.

I can see many of you are able to play those files, so obviously they are shown on their media list. What am I missing here? Does it have anything to do with over the network streaming?

Any helps are much appreciated.