@Alexandre. I managed to solve. Network removed, main device updated, each and every device readded. All is fine. Thank you.

@ftAC tomorrow I'll try and let you know. Thank you anyway.

Hello. I have been using an AP mode X-50 POE mesh net for quite a few months. Lately I added another X-50 POE device to enlarge the wifi zone. There my issues started. The device was succesfully...