XG not available when creating SD-WAN Connection Group

We have 3 XG firewalls managed in Central, 1 XG135 and 2 XG115. When I try to create an SD-WAN Connection Group only the XG135 and 1 of the XG115 show in Available Firewalls. All 3 are running v19.0.0, all are licensed for Central Orchestration, and none are part of a previous Connection Group.

Anyone know where to start troubleshooting this?