The last update as you can see:
is 12 days ago, which means most likely you have the previous version, so an update is highly recommended.
When LCD shows ‘Connecting…’ it IS making a DHCP request and waiting for response to come back. So as I said, if for some reason, the bug was triggered and the controller gets stuck in the connecting loop, that can well explain the DHCP burst.
If you want to try, you can set the controller in static IP, which should bypass the DHCP burst.