Funny you mention that I noticed that the smart unlock for Google assistant wasn't working as well. Saying ok Google even though it's enabled in smart lock does not unlock the phone, it wants my finger print or pattern still. The only way I managed to gtlet around this at home was to allow smart lock to keep my phone unlocked while I was at home. It's an annoying problem especially when listening to music and just want the next track, it's so easy to say ok Google, next track. But not so easy when you have to enter your passcode or pattern after saying it.