Hub mesh fails after power outage

Hub Mesh fails after a power failure. Twice in the last couple of weeks I have had do recreate my meshed devices between a C5 and C7. Latest firmware. The C7 is on a ups. When the hubs come back online they do not see each other. I have to reset the token on both hubs. They then will see each other but the devices have to be shared again. Trying to select them yields a grayed out box. The devices have to be deleted and then they can be selected again. I'm only sharing a few devices but this seems less robust that expected.