I have confiured network as described in 3.2.3 Configure the Raspberry Pi (MELODIC).
Wifi configuration works only once. After rebooting SBC is not connecting WIFI again.
Configuration is file /etc/netplan/50-cloud-init.yaml seems to be ignored.
Problem stays even when I write network: {config: disabled} file to /etc/cloud/cloud.cfg/99-disable-network-config.cfg.
Thanks for advice
Udo