Screen extreme brightness after waking up from standby

Hello. I couldn't get a screenshot to show this issue. After 5.1.1 when waking up phone the brightness of screen is exceedingly bright, then dims down after about 3-5 seconds after or if screen is touched.
What's gives? No root, x reality is off. I loved this phone on kitkat, been horrible after 5.0.2 and 5.1.1.

Hey, I got a fairly new z3c and the same issue.
After the update the brightness is somewhat messed up. I did a backup and reset my phone then did the update so I think this is not something you could just repair yourself.
I got the music widget on my screen and you can see that the brightness even exceeds the normal maximum settings and really distorts colours.
This should get some attention and bet fixed

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