If you migrated Zigbee also make sure both hubs are never on the same channel or disable zigbee on the C5. The underlying zigbee network address is copied for migration but does not change on the old hub even with a reset.
Done. I have them on different channels. Of note, there are no devices on the C5 (yet). BUT, it's showing that zigbee status is offline after I reset the zigbee. Is this normal?
Might have to power down, pull power and reboot to bring it back online. Not sure if that's normal after a reset but its not normal during typical operation.
So I did that. I have a message in the upper right corner saying "ZIGBEE NETWORK OFFLINE" but the ZIGBEE status window in settings no longer shows that. Just blank (screenshot attached)
So, I couldn't even change the ZIGBEE Channel (it was stuck at the old channel). So, I just "unmeshed it" (the C5), and did another soft reset. Working fine now and says ONLINE for ZIGBEE.