Respeaker core V2 - Out of box demo

Just bought a Respeaker core V2.

When I start the ‘Out of box demo’ from the command line it works fine.

When I start the ‘Out of box demo’ after a reboot from the crontab it looks, according to the pixel ring, that te program is running fine but I can’t hear any output. No sound.
Easy to reproduce I guess.

What can be the problem?