Default Strange screen problem with my tab pro 12.2

If i lift the magnetic cover the screen comes on and i enter my password.

If I then close the magnetic cover and then reopen it the screen stays black.

There is nothing I can do to bring the screen back on but close the cover for a few minutes and then try again and then it works.

The point is I can't put the screen back on right away.

Anyone know what is going on and is something wrong?