Encoded Rotary does not send signal to synced ESP32s

Hi,
I have managed to build a two ESP32 wled system:

  1. Master: works with the ALT display+ encoded rotary+audioreactive mic. It is set to Master (Sync)+Sends data via UDP
  2. Slave: receives via UDP and it is synced to receive changes from the master

Everything seems to work stable, changing the effects/presets/etc/etc to the master via the GUI the slave picks up the changes.
I would like to use this installation without the need of mobile phone, that’s why I built the display+rotary.
However, the slave ESP32 does not pick up the changes from the rotary of the master. The rotary works fine and changes the effects/presets/etc on master but the slave does not change/follow. Only if I get in the GUI I can sync the changes from the master to the slave ESP32.

Configure Sync to send changes on button press.

thanks! where can I set this configuration?