My google assistant shuts off immediately after opening up

[Android Central Question]

Pixel (original) won't allow OK Google or the assistant to stay on longer than about 1 second. It opens up ok with voice or home button but before I can get a word out it shuts off. I've reinstalled Google, re did my voice, and no change. I'm on PIE now but it did it before that installation. I've searched on line but no answers, haven't called their help line yet. Thanks