DDP persistency after reboot

I have 2 ESP32 controllers running on 0.14.1 with WS2815 strips (618 and 619 pixels) . They are synchronized through DPP RGB Network.

It works very well right after configuration, but when I power-off-and-on both the controllers and LED strips, the controllers are no longer in sync.

Main controller has effect on its own strips whereas the remote controller has no lights at all.

Web UI into remote controller indicates that it is in DDP.

Reconfiguring from the primary controller will get them in sync again.

How do I configure/setup the controllers for them to sync reliably?