sensor application crashes when I press a button

[wickywaka]

Dear maintainers,

I am evaluating the nrf knx iot stack and have two nrf52840 development kits. After flashing the firmware and then using the knx cli as described here, I proceed with the pressing the button on the sensor board. It makes the board reset.

If I remove the button by using the knx got remove 1 and then press that button then this does not crash the app but does not do anything else. Below you can see the knx configurations. The right side is the sensor device.

Also note that when start up the board, I only see the one line printed *** Booting nRF Connect SDK v2.5.0 *** and not the detailed logs as described in the docs here.

You can see the board reset when I press Button 1 at the bottom of the terminal for the sensor board.

Any idea on how to debug this or what am I doing wrong here.

Thanks.