After DHCP, Commissioner will send BLE indication packet, and at the same time, DHCP6 is on-going, if DHCP6 takes a long time, BLE seems to take over the task and repeatly communicating, despite wifi started dnssd.
To prevent this issue, when DHCP6 starts, if IPv6 address is valid, trigger DHCP6 event and allow dnssd to start first before BLE communication.
Notes: