Constant hiss when upgrading from 1.5.11 to 2.0.14 using DSD over DoP

Has anyone else run into an issue where the foo_input_sacd plugin
version 1.5.11 works perfectly, but after upgrading to 2.0.14, you hear
a constant hiss over the music? It almost sound like an abused, dusty
vinyl recording. I'm using Output Type DSD and DoP for Converter, and
the old version works great, showing DoP being decoded by my DAC. The
latest version, however, seems to be passing along DSD via DoP, but is
inserting quite a bit of hiss noise in the sound output.

Is this a known issue with a workaround or perhaps a setting I have
forgotten to tweak?

– Dave

What output device do you use?

I'm using a Grace m9XX DAC/amp.

This DAC uses XMOS ASIO driver. Have you tried Default: ... [exclusive] 32 bits instead of ASIO: ... ?

I've currently got Grace m9XX (XMOS USB Audio) [exclusive] selected:

Should I pick another option?

And what is "Bits" value under Preferences->Playback->Output->Devices?