Smooth STEM control in Rekordbox with FLX4 (only on/off buttons?)

Hi everyone,

I recently switched from DJAY with a Wego4, where I could control vocals/instrument/beat smoothly using knobs — fading them in and out instead of just toggling.

Now with Rekordbox and the FLX4, I’ve mapped the STEM buttons, but they only work as on/off switches. I’ve tried enabling “Prioritize sound quality” as suggested in some guides, but I still can’t find any way to use them as continuous controls (sliders/knobs).

Is there any way to get gradual STEM control in Rekordbox on Windows, or is it limited to toggle-only right now?

Thanks in advance!