uiSlider bug on uiHorizontalFill

[rafi0]

Code like this:

uiVerticalStack(150.0) {
    uiHorizontalFill {
      uiSlider(value = 0, min = -5, max = 5, step = 1) {
        this.marks = true
      }
      uiText("sample")
    }
  }

produces this result:

however simply changing the order of uiSlider and uiText works correctly:

code for that:

uiVerticalStack(150.0) {
    uiHorizontalFill {
      uiText("sample")
      uiSlider(value = 0, min = -5, max = 5, step = 1) {
        this.marks = true
      }
    }
  }