Unfortunately, turning off Attention Aware did NOT help. I’m outside and the brightness still auto adjusted itself and I was in the shade, not bright sunshine. I did notice that the phone was in Power Save mode (nothing on my phone is set to dim screen automatically) so I turned Power Save mode off, closed all opened apps, went into the bright sun and at about 30-45 seconds later as I began to type this, the brightness returned.
So back to my original opinion that it’s not an Attention Aware issue.
It would be nice if someone from APPLE could actually chime in and say something to the effect of “Hey, we hear you all, we see that this is a common issue, we know you spent 1000. on a shiny new phone and we know that you shouldn’t be experincing this (my phone just dimmed while typing, then returned to normal brightness about 25 seconds later) we are getting to the bottom of it.” I guess they’re waiting for a class action lawsuit before they actually take it seriously.