Good day @Krishneel, so very sorry to keep you waiting.
It might be a DHCP problem, as the brain'll give out a single IP at a time. Maybe the IP lease got stuck, or simply isn't updating right (something we deal with when debugging whatever). Maybe forcing a flush would do it. For that you'll need to access the brain's command line, either directly with a usb keyboard and a screen or via ssh:
- Stop the service with systemctl stop dnsmasq.
- Delete the contents of /var/lib/misc/dnsmasq.leases.
- Restart the service with systemctl start dnsmasq.
You might need to reboot the brain, you could do it just to be sure. After this connect to the wifi with the device you'll be using. This behaviour (1 IP lease per 24H) can be changed through dnsmasq configuration, which can be readily found online.
Does this help? Sorry again for the long wait.