DAW controlled dsp unMutes when Cubase quits

I’m using UR-C devices (22, 44) with Direct Monitoring in C14. I mute the mike input on the Cubase input channel and it is muted on the dspMix software too. The dspMix software shows that the inputs are DAW controlled and can’t be changed there. This is as expected, so far.

When I quit Cubase, the dspMix still shows the channel as DAW controlled and muted, but it’s definitely not muted - instant feedback.

Anyone know a workaround to this (other than unplugging the mikes before quitting Cubase)?