VideoPlayer SEEK doesn't work at all?

Hello, I need a simple thing, just seek to some second of the video.

videoPlayer.time = 10;
videoPlayer.Play();
videoPlayer.Play();
videoPlayer.time = 10;

This code always gives me black texture from the Video Player. "videoPlayer.frame" and callback "seekCompleted" doesn't work too. I tryed different video, for full hd it works sometimes, for 4k it never works. I tryed on Android and Windows.

Why this happens? How could I fix it?

videoPlayer.time = 10;
videoPlayer.Prepare();

I've tryed to fix it by using "PREPARE", but seems it doesn't work either. It doesn't call "prepareCompleted" when I use Prepare(), but it does when I use Play().

It was bugg, fixed in 2017.1 beta