I'm using B4A v 5.80.
It works when I connect to my Samsung S3, which is still on B4A bridge v 2.13.
On my tablet, which is using B4A Bridge v 2.14, it wouldn't connect - couldn't find the IP.
I uninstalled B4A Bridge on the device, downloaded a fresh copy from Googleplay and reinstalled, then rebooted, initially with the same results.
Then it finally it connected - so problem seems to be solved, but the mystery remains.