I have a Nexus 5 with Google Play Services v. 6.5.99 and I'm getting some strange behaviour with the Smart Lock feature.
When I initially used the Trusted Places feature, I noticed that when I drove away from my home, the lock function didn't work automatically. This is also happening on my husband's Nexus 6. I don't think this is right and believe the phone should lock when you move away from the unlock zone.
However, the main problem I'm having is that the phone won't lock when I turn off the Home toggle and have no customised places set up. I also deleted a work address in Google Maps and so this option is naturally greyed out in Smart Lock Trusted Places. At one point, I played around with adding my home as a customised place and have since deleted it. I also changed my home address in Google Maps to my parents' address so I could test it when I was at my own home to see if the phone would lock. Nothing seems to work.
The only way I can get the phone to lock now is to disable the whole Smart Lock feature in Trusted Agents, otherwise I have a phone which won't lock. The exception is after a reboot - I have to unlock it once and then the phone stays unlocked.
Because of this, I can no longer use the Face Unlock feature either.
I've read that some people are finding they have to unlock their phone when it should be unlocked already but it's worse if you have no Trusted Places set and the phone won't lock. Does anyone else have this problem?