rekordbox 4.0.3 bug - drop down menus in Info

Mac OS X 10.10.5, rb 4.0.3
When I click a drop down menu in the Info tab of a track, for instance the Date or the Color drop down, the menu appears for a short time and disappears quickly. The second time I click the menu it will stay open.

It always happen at the first click after loading a track. The second time I click on a pop up it does not happen. It does not matter if I click on another drop down, the pattern is always the same: first click on a menu = it disappears quickly, if I click again on the same menu or I click another menu, it will remain open.