Grisu
Part of the Furniture
ISP >> ISP router (DHCP server) >> AiMesh router in AP mode >> AiMesh node(s)
This is correct!
I thought all the time an Aimesh Master has to run in router mode (with its own DHCP and so on) and it is not possible to run Aimesh Master in AP mode at all!
Are you sure thats your config?