PROBLEMS - Flip Cover - Note 3

Good afternoon,

In my Samsung Note 3 I have been using / and / and I have come across the following problem with the flip cover.

The system crash (blocks) when opening when I open the cover it is stopped as if the cover was closed but is full open.

I have to close for a few seconds and only on the 3rd or 4th try it works.

Thank you

Carlos Correia