Every now and then, some Google "Listening..." screen pops up , like this:
FYI: my device is a Nexus 5X with the latest stock Android 6
I have no idea what this is, and worse: I don't know how to get rid of this. It seems to occur when my earphones (not headset or mic, just earphones) are plugged in. But not consistently, I can't deliberately reproduce this.
Upon searching around I found some suggestions this may be related to Google Now or OK Google, but both are disabled already.
How do I prevent this from ever showing up again?