I am sorry I dont speak spanish but I noticed the issue aswell
Brightness is at 30% not adaptive and when I click on a bright image in "Sync for Reddit" the screen flickers for a millisecond.
Goes a little bit darker and then to normal.
Same thing happens when I go back.
I tried to record the problem but it is not visible on the video as it seems to be a problem with the screen ?
You can see the problem if you set brightness to 30% and watch the video on the phone
https://www.dropbox.com/s/myekgamhsw...55_35.mp4?dl=0
Pay attention to flickering when I switch from picture back to the listview