I have a
similar issue where there are "dead" pixels when light feature is used.
I bought mine at an Indigo store so I was able to quickly exchange it.
I had to go through
two exchanges until I got a good device.
Don't be surprised if the replacement have a defect as well.
I highly suspect there is a bad production batch for these Aura devices.
Somehow Q&A are not checking the light screen on these Auras.