NoUiSlider - doesn't hide lines : <p>I have NoUiSlider 12.1.0 in my CSS theme (modern admin) and it works fine, but there is some problem with CSS. When I move by handle the slider lines behind them are not hiding / changing color. Do anyone know what can cause the problem, or what class/styles I should check?</p>

<p><a href="https://i.stack.imgur.com/VGnSd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VGnSd.png" alt="enter image description here"></a></p>
