Android fading edge disappears

I've got a pretty weird issue and can't find a solution. These two pictures show my problem:

In the first picture you can see, that there is no fading edge. If I move the bottom gallery a little bit further, the upper small gallery switches its position (I implemented this behaviour) and now there is a fading edge o开发者_C百科n both galleries.

The issue comes from the small gallery. But I don't understand why it is affecting the fading edge of the bigger gallery. The same effect appears on the right sight.

Both galleries are nested in a linear layout, which is nested again in a linear layout. I never touch the values for the fading edge.

Does somebody have an idea how to fix the issue?

It seems the fading is added automatically and disabling through XML doesn't work.

However disabling programatically seems to work:

Gallery carousel = (Gallery)findViewById(R.id.image_carousel);
carousel.setHorizontalFadingEdgeEnabled(false);