Not a big problem, and not a problem in B4J. If you set visible = false in designer and later set it to visible in code, the slider appears but the inside label remains invisible.
The label is not exposed, so to fix it, just keep the view visible in designer and set RS.mBase.visible = false just after loading the layout.
The label is not exposed, so to fix it, just keep the view visible in designer and set RS.mBase.visible = false just after loading the layout.