Why does a red crossed circle appear sometimes when trying to ajust a knob?
because the parameter is addressed to a hardware knob or controller.
starting on 1.3 you get a small popup in the corner explaining this, so the situation is less confusing.
Is this feature a consequence of a technical limitation hardware/software because I would prefer it doesn't exist or could be disabled.
I'd love the ability to disable it as well.
That's a software limitation and will be addressed in a future release. Check here: https://forum.moddevices.com/t/adjust-in-gui-and-mod.