Mac OS X Context menu disappears on mouse up

[jackolo]

I have OS X El Capitan 10.11.5.
When I right click on an item in the sidewise window, the context menu shows up and it disapears when I release the mouse. If that was intended behavior then it is very unortodox/counterintuitive, I never saw it working this way elsewhere. Please also note it is not possible to use it with a touchpad when you have the secodnary mouse click defined as two finger tap.
Shortcuts or a toolbar for the actions in context menu would save a day and would be handy anyways.
Thanks for a great plugin BTW.