When adding two stick bars directly on top of each other, the second doesn’t stay connected to the first one.
I reported this on April 27th and it was added as a known bug for Pro 1.0.4 and it’s still not fixed. The proposed CSS fixes still produce a stutter/jump when scrolling. We use this for many clients when we have sticky menus for desktop and mobile and when they ask if this stutter can be removed, we have no answers for them.