Black blink when returning after orientation change

As you can see on this video: https://www.youtube.com/watch?v=CigNib7UI3g&feature=youtu.be , if you open the detail activity, rotate the device and come back, there's a black blink.

If you use the "Do not keep activities" developer option, sometimes it works, and sometimes the reenter transition never starts.

This is happening on a Nexus 5X. No problem on a Samsung Galaxy Note 5. Still, the Google Photos app does it perfectly, so there's a way to do it.

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