Nothing weired.
Muting an input has an impact on all submixes because you mute that input.
This makes sense because by this, you can mute an input faster for all the submixes instead of having to click to every HW output and to turn the input fader down .. (submix per submix, output per output, simply takes too long).
This is useful in situations where you want to prevent noise coming in from e.g. a not connected analog port.
Then it makes sense to mute this input quickly for each of the outputs where the input fader might potentially be set to up which would induce noise into those submixes.
In contrast to that:
- if you want to deactivate an input for a particular submix, then you would simply turn the input fader down
- if you pan an input, then this is also an operation for a particular HW output / aka "submix".
Think about it … and that there are recording interfaces with up to 198 HW outputs / submixes (MADIface XT).
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub14