I'm at a loss, and this problem is both annoying and embarrassing.
If I'm in the Messages app and I was texting someone, then I go to blank the screen with the power button and put the phone away, I will occasionally feel the phone vibrate and then notice that a call was being placed to the person I was texting!
My fingers are nowhere near the call icon (top right of screen) when this happens. I've tried factory restore, I've tried decreasing the screen sensitivity (due to a screen protector). i had the phone for months without an issue, until Android Pie installed.
Has anyone else noticed a problem like this? Any ideas?