Vertical scroll position of modal saves between openings

Created by: GooDVim

I use a default modal like in a documentation: http://getbootstrap.com/javascript/#modals I open a modal for a first time ('Launch demo model' button), scroll down and click 'Close'. Everything is ok.

Then I open it again and it is already scrolled down. Modal has the same position where it was closed.

Is it a normal behavior? And how could I open the modal for a second time in top scroll position?

P.S. I am sorry if I write it in wrong place, but I did find an answer on my question in the documentation.