@JTsao based on your ticket, I don't think this is useful to you now, but might help someone else later.   When PG3x migrates node servers from PG3, it leaves them in the disconnected state.  You need to manually start the node servers after migration.  You're post says you tried "rebooting, power cycling and restarting PG3x" and none of those steps will attempt to start the node servers when they've been previously stopped.  PG3 and PG3x remember the last state of node servers.