Buzz sound when changing preset in arranger

How to:

Load a preset in arrangment
loop it
play
then change preset with arrow keys or by selecting on out of the list

During loading the new preset I get a “buzz noise” as loud as the song is.

If changing without play no buzz sound occurs

MacOS Sequoia 15.3.2 on a MacBook Pro M3Max internal sound card

After now updating to Scaler 3.01 the buzz is gone but still a bit “crcks” but not as loud as the buzz sound and shorter as in Scaler 3.0.
Something has changed.

When I stop play the sound rings out. When I change preset it depends on what was played a short click or some other crck. Maybe the tracks should be muted before changing the preset or play should stop