Problem with 'ginput' in a GUI with OpenGL Renderer

I have a problem when I try to use the 'ginput' command on an axes in my GUI. When I move my cursor around this axes it's like painting the previous displayed image in the axes, obstructing the view of the current image I want to click on. Furthermore, the crosshair movement is very slow.

It only happens when the 'Renderer' is set to 'opengl'. When I use 'painters' instead of 'opengl' it works perfectly, there is no "painting effect" and the crosshair movement is normal... But I need the 'opengl' Renderer to apply some transparency properties to some elements like patches.

What can I do to solve this strange behaviour of the 'ginput'? What do you recommend me? Thanks!