That’s what the Space does when you change presets via MIDI PCs.

So you have to change your playing a little bit, like changing presets only when nothing is going on.

Or you can activate the preset with mix knob at 0, and then with a CC send the desired mix value. That’s what I do.

Also, make sure you save the preset with the mix value at 0.

If you are not using MIDI, then your unit must be defective I think because I’ve never heard of a similar problem.

Thank you for your advice. I’m not using MIDI, but it has transpired that my software was not up to date. An update seems to have fixed the issue. Cheers for your reply!