Hi @Eric_McClure
Did you open a ticket with Meraki support ?
I'm usually doing the same by staging spokes ahead but I dont remember the routes to be advertised before network being turned up
However, I faced a similar issue on the hub side => when a hub was down, the route was kept in the routing table of all spokes leading to a blackhole situation
After few discussions with Meraki, they activated a backend feature (has_track_peer_true_for_l3_vpn_hub_routes) to start tracking those routes and stop advertising them if the hub was down .
They may have a similar feature for spokes