MAAS GUI Configuraton Not Sync

Hi,

I use MAAS version 3.1.0 via snap and create KVM host LXD Cluster in node-1, i join another node (node-2) to LXD but in MAAS just detected 1 member

i register rack controller in another node server but in GUI just detected 1 rack controller
but in network ip address node-2 have assigned in rack controller node-1
how to sync maas gui and lxd config? and how to add another node to be a rack controller to the rack node-1 region?