Is Manual Really Correct?

Hi,

In manual of MR page 33 at the top , we have:

IMPORTANT
The MR Editor is used when you use a DAW other than Cubase or you want to set the necessary settings for using the MR816 CSX/MR816 X without connecting a computer. N

Is this really correct? It seems it is not true. Many times my output above 2, that, 3,4, … ( to my other monitors and cues) are muted and I have to open MR Editor to turn unmet them but taking the fader for those output channels up.

Am I wrong, or there is a way to fix this issue? In other words, can un-mute those output channels within cubase?

Thank you,

CS