Help My phone keeps asking me to setup Unlock with "OK Google" even though I've set it up.

[brownbag68]

My phone keeps asking me to setup Unlock with "OK Google" even though I've set it up. The first time I was prompted I clicked into it, confirmed with "Yes I'm in", confirmed my pattern and then I found that it was set to "Always On" with "Trusted Voice" set.

I have a Nexus 6P running Android 7.0

How do I stop my phone asking me to do this?