I updated Maps yesterday and I believe smart lock is now working.
I also added a completely different address that is several miles from my home address and work, so I don't think that's what has caused it to work now.
Just my observation.
— Only1canoliMine started working again yesterday. Sorry I was wrong, had to add all my neighbors to get it to work.
Posted from deep inside my phone!
Couldn't get this to work with my Nexus 7 , Android 5.1 until I manually added my home address using the search option in "Add trusted place" (don't use "Select this location" ). I now have my Home address "From Google Maps" and the manually entered copy of my home address in the trusted places list. Seems like the bug is related to Google Maps selected addresses?
Here is what worked for me on my N6 and N9.
Turn off smart unlock on your home and work and remove any other addresses.
under security in the advanced section choose trusted agents
Turn off smart unlock
back out (might not be necessary)
go back in and turn it on
Now add back in your addresses.
Hope this helps.
What Play services version number is that, codemonkey?Latest play services resolves it for me.