CoreInk Multifunction Button not working

hooble

Hi all

I am facing a weird problem with a new CoreInk -> the multifunction button does not work. I am using UIFlow 1.12.4 and created the following Blockly:

0_1694910048760_Bildschirmfoto vom 2023-09-17 02-18-41.png

But pressing the button UP simply does nothing. If I swap UP to EXT and press the EXT button, the image gets changed and I hear a beep.

Am I doing something wrong here?

Thanks a lot