Spdif mute and solo in mono

[Briareos]

Hi,

I have a two channels preamp connected to my audiofuse studio with coaxial spdif.
I'd like to use it as two mono channels so I had the sdpif in the main mix as two mono channels.
The left channel (spdif 1) isthe guitar DI and the roght channel (spdif 2) is the output of the Two Notes Captor X (guitar cabinet simulator).
https://drive.google.com/file/d/1_nfJEOz2Tx97ncxyUxYN4dU4UsYNuS0o/view?usp=sharing

And I want to use the audiofuse to monitor my guitar, just to ear it. Everything is working as expected I hear the DI Signal and the amp signal.
Execp for one thing, if I engage the solo or the mute button on the spdif 1 or spdif 2, it engage it for the two channels the spdif 1  and spdif 2.

It works fine in my daw (Studio One v5) but and just want to ear my guitar, only the amp signal, I don't want to hear the DI signal.

Thanks in advance.