MBP 13 2019 black flashes in part of the screen

Yes, the issue goes away for a while, only to return later. I have had some mild flickering right after waking my machine up, so perhaps you're right, but I've also had the same issue a long time after wake up. So there's definitely something else at play here.

Yep, I have the exact same issue. Happens both when connected to power and when running on battery.

Some people have said they took their MacBook to an Apple Store and got a replacement, only to have the issue reappear in the new machine...

I recently got a new MPB 2019 13" and I am having the same problems too. It's only happened once or twice but the lower third of the screen flashes red or white very briefly. I wonder what the deal is...

It's hard to know whether this is related to software or hardware, but considering that some people have got replacements and still have the same issue, I would say software is at least partly to blame.

Hey @lpuerto,

Quick update (and possible solution): last week, I noticed that the flickering occurs especially when the screen is adjusting to a new/warmer ambient light. I decided to turn off True Tone and auto-brightness, and haven't had a single glitch ever since! This was on Thursday, BTW.

I suggest you try doing the same, let me know if it works for you. If this is indeed about True Tone and/or auto-brightness, I would imagine Apple can solve it through a software update.

I'm not sure whether it's before or after sleep, but I'll try to run some tests and let you know.

I also don't have this problem while connect to a second screen.

That's exactly the same for me. Around 30%-40% up from the bottom of the screen.