XBEE routers sometimes loose lower 6 bytes of Extended PAN ID


I’m doing test with one coordinater(connected to PC) and 5 routers(+ Arduinos).
[Extended PAN ID = ‘2’,‘0’,‘2’,‘0’,‘I’,‘D’,‘A’,‘B’)

Normally, all of them works fine.
But sometimes 1 or 2 routers leave its network and change their Extended PAN ID like,
Original extended PAN ID = ‘2’,‘0’,‘2’,‘0’,‘I’,‘D’,‘A’,‘B’ -> ‘2’,‘0’ .

(I guess this comes up after power cycling, but not exactly.)

If there’s someone who knows why, please let me know. thank you.

Yes, if you power cycle the coordinator, it can change networks.