Ruckus Access Points send an ARP request out the Ethernet port to the default gateway to determine if the AP is connected by wire or should switch to MESH mode. Check to make sure the AP has a valid Default Gateway configured (get ipaddr wan) and that the default gateway/router is responding to ARP requests from the AP.
For more detail on MESH please check the following Knowledge Base articles:
This sounds like the Mesh and eMesh APs are connected to the same switch and the switch has lost its uplink. One of the 2 isolated APs meshed to a root AP (one of the 10 on the wired network) and it will show up as a Mesh AP. The other isolated AP will get its ethernet connection from the Mesh AP (via the switch) and will show up as eMesh. I suggest checking the uplink on the switch that these 2 APs are connected to.