FLX4 Smart Fader Function a bit strange

I find the smartfader function a bit strange.
If I pull down a channel fader or crossfader completely (to the other deck with xfader), the sound becomes quieter, but then with closed fader the reverb comes through again fully loud. This sounds strange. Exactly the same problem is there, if one consciously uses the ColorFX to get out of the track. There you use the FX as a stylistic device to come smoothly over into the other deck. At the end with closed fader again such a reverb with full energy from the SmartFader function. That is very strange and could be nicer made by pioneer.

Firmware is currently on 1.02. Rekordbox is also on the latest version. Macbook Pro M1.