Do you have the module in compression mode? If so, then turning Mod clockwise past 12 o’clock makes the quietest parts of you input signal louder, which means that clicks and pops present in the input signal which were too quiet to notice previously become audible. Thus Streams may be allowing you to hear clicks and pops in your input signal too which you were previously unaware. Of course, turning Mod counter-clockwise from 12 o’clock will correspondingly reduce those noises, in relation to the louder parts of your input signal.
I’ve not been using it in compresion mode. But the noise is audible in all four main modes.
It happens when there is no input signal present as well as when there is.
Everything is clean and pretty much silent until the Level Mod knob gets to about 1 o’clock, then there are crackles when the knob moves the rest of the way. The noise is only when the knob moves, the sound is clean otherwise.