20-bit FLAC doesn't load properly

[inoto]

Loading a 20-bit FLAC in Reaper produces only silence.

Here's a test file, if you want to try it: https://www.dropbox.com/s/7usa8tob7c...8000.flac?dl=1

20-bit FLACs are rare, but they're legal.


edit: The same happens with 12-bit FLACs.
edi2: 8-bit FLACs too.