RAK7258 Client wireless not working with firmware 1.2.2

Issue: Wireless Client not able to connect when using formware 1.2.2

Setup:firmware 1.2.2

LoRa® Server: own server

Details:When installing the RAK7258 at a location, no LAN connection was available.
The RAK7258 was updated with the latest firmware, however setting the Wireless to Client + AP (or only to client mode) resulted that the client was unable to connect to the network.
On firmware 1.0.1_RAK rRAK-96aa330, this is working…